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Bedrock Edition:Potentially Dangerous Versions

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Below is a list of versions that can corrupt or damage your world and versions that cause crashes. If the given version affects entities, blocks etc. in the way you wouldn't like to and still want to play on that version, keep them in unloaded chunks and remove them from your spawn chunks before updating.

Danger Definitions

Dangers Meaning
Hardlock Damages the world making it permanently unplayable.
Softlock Damages the world in a way that retains all data, but severely inhibits or completely prevents gameplay (e.g. crash loop).
Chunk Corruption Damages the world by deleting or modifying chunks.
World Files Damages world settings or other miscellaneous world data, such as player inventories, maps, etc.
Crash Causes the game to crash once. See Softlock for crash loops.
Performance Decreases the performance of the world.
Player Death Is able to kill the player in an unintended fashion.
Item Damage Damages items in the world.
Block Damage Damages blocks in the world, and/or discontinued block combinations.
Entity Damage Damages entities in the world.

Pocket Edition Alpha

0.3.0

Version Issue Bug Report Danger
v0.3.3 alpha The game crashes if the player dies while charging a bow. N/A Crash

0.6.0

Version Issue Bug Report Danger
v0.6.0 alpha - v0.6.1 alpha The game crashes if a TNT explosion attempts to destroy a painting. MCPE-1366 Crash
The game crashes if a sign is destroyed while a player is writing on it. MCPE-1683
MCPE-1776
Crash

0.7.0

Version Issue Bug Report Danger
v0.7.4 alpha Sending "/" in the chat crashes the game. MCPE-5192 Crash
On iOS devices, attempting to place a cake or sugar cane crashes the game. MCPE-5201 Crash
When a vertical double chest is created and the player exits and re-enters the world, the two chests separate, with the chest placed second becoming invisible. Attempting to open the invisible chest causes the game to hang. MCPE-5202 Crash

0.8.0

Version Issue Bug Report Danger
v0.8.0 alpha build 1 Several invalid data values of logs are obtainable by mining their respective block forms in this version. Attempting to select data values 4 and 5 in the inventory crashes the game. MCPE-5840 Crash
If a downwards-flowing lava stream has two water source blocks on top of one another next to it on at least one side, an extreme amount of smoke particles are produced and the game crashes. MCPE-5933 Crash
v0.8.0 alpha build 2 Several invalid data values of logs are obtainable by mining their respective block forms in this version. Attempting to select data values 4 and 5 in the inventory crashes the game. MCPE-5840 Crash
If a downwards-flowing lava stream has two water source blocks on top of one another next to it on at least one side, an extreme amount of smoke particles are produced and the game crashes. MCPE-5933 Crash
If a world is saved with an entity riding a minecart in it, attempting to reopen the world causes the game to crash on the saving chunks screen. MCPE-6005 Softlock
The game crashes if a minecart is destroyed by any non-player means. MCPE-5740 Crash
v0.8.0 alpha build 3 - v0.8.0 alpha build 8 If data value 4 or 5 logs were obtained in a previous version, attempting to select either one in the inventory crashes the game. N/A Crash
v0.8.0 alpha - v0.8.1 alpha The game crashes when a sign with emoji symbols on it is rendered. N/A Crash + Softlock
If data value 4 or 5 logs were obtained in a previous version, attempting to select either one in the inventory crashes the game. N/A Crash

0.9.0

Note: the 0.9.0 builds contain numerous inconsistent crash, damage, and softlock bugs that are not documented here.
Version Issue Bug Report Danger
v0.9.0 alpha build 1 If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash
The contents of monster spawners are not saved in this version. Upon re-entering the world, any existing monster spawners are converted to pig spawners in build 1, or to empty spawners in later builds. N/A Block Damage
Mineshaft structures regenerate themselves every time the world is reloaded. This destroys any blocks placed where parts of the structure normally generate. N/A Block Damage
The game crashes when an attempt to destroy a block supporting a sloped rail is made. This crash also occurs if the player creates a floating sloped rail and the rail either receives a block update or an attempt to destroy it is made. N/A Crash
Vine data values were organized differently prior to v0.9.0 alpha build 7, meaning that updating from previous 0.9.0 builds to any later version[test] can result in invalid vine configurations. N/A Block Damage
If a world is saved while the player is riding a minecart, attempting to reopen the world causes the game to crash on the building terrain screen. N/A Softlock
v0.9.0 alpha build 2 If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash
Mineshaft structures regenerate themselves every time the world is reloaded. This destroys any blocks placed where parts of the structure normally generate. N/A Block Damage
The game crashes when an attempt to destroy a block supporting a sloped rail is made. This crash also occurs if the player creates a floating sloped rail and the rail either receives a block update or an attempt to destroy it is made. N/A Crash
Vine data values were organized differently prior to v0.9.0 alpha build 7, meaning that updating from previous 0.9.0 builds to any later version[test] can result in invalid vine configurations. N/A Block Damage
If a world is saved while the player is riding a minecart, attempting to reopen the world causes the game to crash on the building terrain screen. N/A Softlock
The game hangs on the loading world screen if the selected world contains a column with only air on an odd Z-coordinate. N/A Softlock
Changing a monster spawner's configuration using a spawn egg only saves if any other changes to non-spawner block entity data are made in the same chunk as it. N/A Block Damage
v0.9.0 alpha build 3 - v0.9.0 alpha build 6 If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash
The game crashes when an attempt to destroy a block supporting a sloped rail is made. This crash also occurs if the player creates a floating sloped rail and the rail either receives a block update or an attempt to destroy it is made. N/A Crash
Vine data values were organized differently prior to v0.9.0 alpha build 7, meaning that updating from previous 0.9.0 builds to any later version[test] can result in invalid vine configurations. N/A Block Damage
If a world is saved while the player is riding a minecart, attempting to reopen the world causes the game to crash on the building terrain screen. N/A Softlock
The game hangs on the loading world screen if the selected world contains a column with only air on an odd Z-coordinate. N/A Softlock
Changing a monster spawner's configuration using a spawn egg only saves if any other changes to non-spawner block entity data are made in the same chunk as it. N/A Block Damage
v0.9.0 alpha build 7 If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash
The game crashes when an attempt to destroy a block supporting a sloped rail is made. This crash also occurs if the player creates a floating sloped rail and the rail either receives a block update or an attempt to destroy it is made. N/A Crash
If a world is saved while the player is riding a minecart, attempting to reopen the world causes the game to crash on the building terrain screen. N/A Softlock
The game hangs on the loading world screen if the selected world contains a column with only air on an odd Z-coordinate. N/A Softlock
Changing a monster spawner's configuration using a spawn egg only saves if any other changes to non-spawner block entity data are made in the same chunk as it. N/A Block Damage
v0.9.0 alpha build 8 If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash
The game crashes when an attempt to destroy a block supporting a sloped rail is made. This crash also occurs if the player creates a floating sloped rail and the rail either receives a block update or an attempt to destroy it is made. N/A Crash
If a world is saved while the player is riding a minecart, attempting to reopen the world causes the game to crash on the building terrain screen. N/A Softlock
Changing a monster spawner's configuration using a spawn egg only saves if any other changes to non-spawner block entity data are made in the same chunk as it. N/A Block Damage
v0.9.0 alpha build 9 - v0.9.0 alpha build 11 If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash
If a world is saved while the player is riding a minecart, attempting to reopen the world causes the game to crash on the building terrain screen. N/A Softlock
Changing a monster spawner's configuration using a spawn egg only saves if any other changes to non-spawner block entity data are made in the same chunk as it. N/A Block Damage
v0.9.0 alpha build 12 - v0.9.0 alpha If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash
Changing a monster spawner's configuration using a spawn egg only saves if any other changes to non-spawner block entity data are made in the same chunk as it. N/A Block Damage
v0.9.1 alpha - v0.9.5 alpha If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash

0.10.0

Version Issue Bug Report Danger
v0.10.0 alpha build 1 If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash
The game crashes when a minecart is rendered. N/A Crash + Softlock
v0.10.0 alpha build 2 - v0.10.0 alpha build 8 If data value 4, 5, or 6 logs were obtained in a previous version, attempting to select any of them in the inventory crashes the game. N/A Crash

0.11.0

Version Issue Bug Report Danger
v0.11.0 alpha build 1 The game crashes if a previously-saved arrow entity is loaded in. N/A Crash + Softlock
The game crashes if a furnace with items inside of it is broken. MCPE-8185 Crash
When loading into a world, the player is sometimes spawned in with incorrect velocity and rotation data. This can cause the player to fall through any non-fluid blocks and die once from either suffocation or void damage. N/A Player Death
The game crashes if a chest is broken after an item is removed from it. N/A Crash
Changes to any block entities within a given chunk are only saved if another block entity is placed in the same chunk as them. MCPE-8233 Item + Block Damage
Chunk loading hangs when the game attempts to generate a new chunk containing a mushroom fields biome. Once this occurs, attempting to quit to the main menu also causes the game to hang. MCPE-8826 Crash + Softlock
v0.11.0 alpha build 2 The game crashes if a furnace with items inside of it is broken. MCPE-8185 Crash
When loading into a world, the player is sometimes spawned in with incorrect velocity and rotation data. This can cause the player to fall through any non-fluid blocks and die once from either suffocation or void damage. N/A Player Death
The game crashes if a chest is broken after an item is removed from it. N/A Crash
Changes to any block entities within a given chunk are only saved if another block entity is placed in the same chunk as them. MCPE-8233 Item + Block Damage
Chunk loading hangs when the game attempts to generate a new chunk containing a mushroom fields biome. Once this occurs, attempting to quit to the main menu also causes the game to hang. MCPE-8826 Crash + Softlock
v0.11.0 alpha build 3 When loading into a world, the player is sometimes spawned in with incorrect velocity and rotation data. This can cause the player to fall through any non-fluid blocks and die once from either suffocation or void damage. N/A Player Death
The game crashes if a chest is broken after an item is removed from it. N/A Crash
Changes to any block entities within a given chunk are only saved if another block entity is placed in the same chunk as them. MCPE-8233 Item + Block Damage
Chunk loading hangs when the game attempts to generate a new chunk containing a mushroom fields biome. Once this occurs, attempting to quit to the main menu also causes the game to hang. MCPE-8826 Crash + Softlock
v0.11.0 alpha build 4 The game crashes if a chest is broken after an item is removed from it. N/A Crash
Changes to any block entities within a given chunk are only saved if another block entity is placed in the same chunk as them. MCPE-8233 Item + Block Damage
Chunk loading hangs when the game attempts to generate a new chunk containing a mushroom fields biome. Once this occurs, attempting to quit to the main menu also causes the game to hang. MCPE-8826 Crash + Softlock
v0.11.0 alpha build 5 - v0.11.0 alpha build 11 Chunk loading hangs when the game attempts to generate a new chunk containing a mushroom fields biome. Once this occurs, attempting to quit to the main menu also causes the game to hang. MCPE-8826 Crash + Softlock
v0.11.0 alpha build 12 - v0.11.0 alpha build 13 Chunk loading hangs when the game attempts to generate a new chunk containing a mushroom fields biome. Once this occurs, attempting to quit to the main menu also causes the game to hang. MCPE-8826 Crash + Softlock
The game crashes if the player is inflicted with Poison. N/A Crash
v0.11.0 alpha build 14 - v0.11.1 alpha Chunk loading hangs when the game attempts to generate a new chunk containing a mushroom fields biome. Once this occurs, attempting to quit to the main menu also causes the game to hang. MCPE-8826 Crash + Softlock

0.12.0

Version Issue Bug Report Danger
v0.12.1 alpha build 1 Regular golden apples and enchanted golden apples stack with each other. N/A Item Damage
v0.12.1 alpha build 2 Regular golden apples and enchanted golden apples stack with each other. N/A Item Damage
The game crashes if an item is removed from the first or third slots of an anvil. MCPE-9465 Crash
v0.12.1 alpha build 3 Regular golden apples and enchanted golden apples stack with each other. N/A Item Damage
v0.12.1 alpha build 4 - v0.12.1 alpha build 7 Removing any item from a brewing stand deletes it instead of transferring it to the player's inventory. MCPE-9814 Item Damage

0.13.0

Version Issue Bug Report Danger
v0.13.0 alpha build 1 Placing opaque blocks directly above at least two redstone torches that serve as inverted inputs in an AND gate crashes the game. N/A Crash

0.14.0

Version Issue Bug Report Danger
v0.14.0 alpha build 1 The game hangs when a sign with emoji symbols on it is rendered. N/A Crash + Softlock
Attempting to add or remove any items from a minecart with chest crashes the game. MCPE-12497 Crash
Inactive minecarts with TNT activate upon reloading the world. MCPE-12512 Entity Damage
The game crashes if an arrow, egg, or snowball shot from a dispenser hits a minecart with TNT. MCPE-14357 Crash
v0.14.0 alpha build 2 The game hangs when a sign with emoji symbols on it is rendered. N/A Crash + Softlock
Attempting to add or remove any items from a minecart with chest crashes the game. MCPE-12497 Crash
The game crashes if an arrow, egg, or snowball shot from a dispenser hits a minecart with TNT. MCPE-14357 Crash
v0.14.0 alpha build 3 The game hangs when a sign with emoji symbols on it is rendered. N/A Crash + Softlock
The game crashes if an arrow, egg, or snowball shot from a dispenser hits a minecart with TNT. MCPE-14357 Crash
The contents of a minecart with chest in a given chunk are only saved if at least one of the following conditions occurs after its contents are changed and before the player exits the world:
  • A non-block entity is created in the same chunk as it.
  • A non-block entity is destroyed in the same chunk as it.
  • A non-block entity moves into the same chunk as it.
  • The minecart with chest moves into a different chunk.
N/A Item + Entity Damage
v0.14.0 alpha build 4 The game hangs when a sign with emoji symbols on it is rendered. N/A Crash + Softlock
The game crashes if an arrow, egg, or snowball shot from a dispenser hits a minecart with TNT. MCPE-14357 Crash
The contents of a minecart with chest in a given chunk are only saved if at least one of the following conditions occurs after its contents are changed and before the player exits the world:
  • A non-block entity is created in the same chunk as it.
  • A non-block entity is destroyed in the same chunk as it.
  • A non-block entity moves into the same chunk as it.
  • The minecart with chest moves into a different chunk.
N/A Item + Entity Damage
Items are not properly transferred into or out of hoppers, potentially breaking redstone contraptions. MCPE-13064 Block Damage
v0.14.0 alpha build 5 - v0.14.0 alpha build 6 The game hangs when a sign with emoji symbols on it is rendered. N/A Crash + Softlock
The game crashes if an arrow, egg, or snowball shot from a dispenser hits a minecart with TNT. MCPE-14357 Crash
The contents of a minecart with chest in a given chunk are only saved if at least one of the following conditions occurs after its contents are changed and before the player exits the world:
  • A non-block entity is created in the same chunk as it.
  • A non-block entity is destroyed in the same chunk as it.
  • A non-block entity moves into the same chunk as it.
  • The minecart with chest moves into a different chunk.
N/A Item + Entity Damage
v0.14.0 alpha build 7 - v0.14.1 alpha The game hangs when a sign with emoji symbols on it is rendered. N/A Crash + Softlock
The game crashes if an arrow, egg, or snowball shot from a dispenser hits a minecart with TNT. MCPE-14357 Crash
v0.14.2 alpha - v0.14.3 alpha The game crashes if an arrow, egg, or snowball shot from a dispenser hits a minecart with TNT. MCPE-14357 Crash

0.15.0

Version Issue Bug Report Danger
v0.15.0 alpha build 1 - v0.15.2 alpha The game crashes if an arrow, egg, fire charge, or snowball shot from a dispenser hits a minecart with TNT. MCPE-14357 Crash
Activating a redstone contraption that makes a piston push itself causes the game to crash. MCPE-14522 Crash
The game crashes when a cauldron with any liquid in it is pushed by a piston. MCPE-14805 Crash
The game crashes if a piston moves a detector rail with a minecart on it to an invalid location. MCPE-16093 Crash
v0.15.3 alpha - v0.15.10 alpha The game crashes when a cauldron with any liquid in it is pushed by a piston. MCPE-14805 Crash
The game crashes if a piston moves a detector rail with a minecart on it to an invalid location. MCPE-16093 Crash

0.16.0

Version Issue Bug Report Danger
v0.16.0 alpha build 1 - v0.16.0 alpha build 3 The game crashes when a cauldron with any liquid in it is pushed by a piston. MCPE-14805 Crash
The game crashes if a piston moves a detector rail with a minecart on it to an invalid location. MCPE-16093 Crash
The game crashes when a chunk near a stronghold that generates underneath a village is loaded. MCPE-14641 Crash + Softlock
v0.16.0 alpha build 4 The game crashes when a cauldron with any liquid in it is pushed by a piston. MCPE-14805 Crash
The game crashes if a piston moves a detector rail with a minecart on it to an invalid location. MCPE-16093 Crash
The game crashes when a chunk near a stronghold that generates underneath a village is loaded. MCPE-14641 Crash + Softlock
Effects applied to any mobs, including the player, are not saved in this version. MCPE-17081 Entity Damage
The game crashes if a pig or villager is struck by lightning on Peaceful difficulty. MCPE-17259 Crash
Horses with markings on them saved in a previous version either gain glitched textures or crash the game when rendered. N/A Entity Damage + Crash + Softlock
The player's health, hunger, saturation, and oxygen levels are not properly saved and are set to full upon reloading the world. N/A Entity Damage
In worlds last saved in a previous version, any equipment on horses and pigs is deleted. N/A Entity Damage
Arrows shot by the player or dispensers cannot be collected. N/A Item Damage
Any entities on fire are extinguished upon reloading the world. N/A Entity Damage
Minecarts with hoppers previously saved in v0.16.0 build 3 or earlier become permanently disabled, even if they pass over an activator rail. N/A Entity Damage
Villagers updated to this version lose their profession and turn into farmers. N/A Entity Damage
v0.16.0 alpha build 5 The player's oxygen level is not properly saved and is set to full upon reloading the world. N/A Entity Damage
Arrows shot by dispensers cannot be collected. N/A Item Damage
Any entities on fire are extinguished upon reloading the world. N/A Entity Damage
Minecarts with hoppers previously saved in v0.16.0 build 3 or earlier become permanently disabled, even if they pass over an activator rail. N/A Entity Damage
The game frequently crashes when a mob killed by a Looting-enchanted sword has its drops transferred into a hopper. MCPE-18371 Crash
v0.16.0 alpha - v0.16.2 alpha The player's oxygen level is not properly saved and is set to full upon reloading the world. N/A Entity Damage
Arrows shot by dispensers cannot be collected. N/A Item Damage
The game frequently crashes when a mob killed by a Looting-enchanted sword has its drops transferred into a hopper. MCPE-18371 Crash

Pocket Edition

1.0.0

Version Issue Bug Report Danger
alpha 0.17.0.1 The player's oxygen level is not properly saved and is set to full upon reloading the world. N/A Entity Damage
Arrows shot by dispensers cannot be collected. N/A Item Damage
The game frequently crashes when a mob is killed by a Looting-enchanted sword. MCPE-18371 Crash
The game crashes if an end portal is rendered while fancy graphics is off. MCPE-18140 Crash
The game crashes when a hopper collects an item entity. MCPE-18157 Crash
The game crashes when an enderman is hit by a splash water bottle. N/A Crash
alpha 0.17.0.2 Arrows shot by dispensers cannot be collected. N/A Item Damage
alpha 1.0.0.0 - 1.0.9 The game crashes if an open chest is moved by a piston. MCPE-19980 Crash

1.1.0

Version Issue Bug Report Danger
alpha 1.1.0.0 - alpha 1.1.0.1 Dyeing a shulker box deletes its name and its contents. MCPE-20739 Item Damage
The game crashes if an open chest is moved by a piston. MCPE-19980 Crash
The game crashes if the player falls into the void while their render distance is set to a value greater than eight chunks. MCPE-21240 Crash
Maps that generate in stronghold library chests crash the game when transferred into the player's inventory. MCPE-22444 Crash
alpha 1.1.0.3 Dyeing a shulker box deletes its name and its contents. MCPE-20739 Item Damage
Attempting to write more than four lines of text on a sign crashes the game. N/A Crash
The game crashes if an open chest is moved by a piston. MCPE-19980 Crash
The game crashes if the player falls into the void while their render distance is set to a value greater than eight chunks. MCPE-21240 Crash
Maps that generate in stronghold library chests crash the game when transferred into the player's inventory. MCPE-22444 Crash
alpha 1.1.0.4 Attempting to write more than four lines of text on a sign crashes the game. N/A Crash
The game crashes if an open chest is moved by a piston. MCPE-19980 Crash
The game crashes if the player falls into the void while their render distance is set to a value greater than eight chunks. MCPE-21240 Crash
Maps that generate in stronghold library chests crash the game when transferred into the player's inventory. MCPE-22444 Crash
alpha 1.1.0.5 - alpha 1.1.0.9 The game crashes if the player falls into the void while their render distance is set to a value greater than eight chunks. MCPE-21240 Crash
Maps that generate in stronghold library chests crash the game when transferred into the player's inventory. MCPE-22444 Crash
1.1.0 - 1.1.5 Maps that generate in stronghold library chests crash the game when transferred into the player's inventory. MCPE-22444 Crash

Bedrock Edition

1.2.0

Version Issue Bug Report Danger
beta 1.2.0.2 - beta 1.2.0.11 Maps that generate in stronghold library chests crash the game when transferred into the player's inventory. MCPE-22444 Crash

1.17.0

Version Issue Bug Report Danger
1.17.10[test] Going through an end portal gives the player fall damage based on its height in the Overworld. An end portal being on Y=76 is enough to kill an unarmored player. MCPE-135226 Player Death

1.19.0

Version Issue Bug Report Danger
1.19.71 Creating a tutorial world crashes the game. N/A Crash