Java Edition:Speed Suspicious Stew
Speed Suspicious Stew is an item obtainable from 18w43a (1.14 snapshot) to 1.14.4 Pre-Release 6. In 1.14.4 Pre-Release 1 and later, suspicious stew crafted with a poppy makes Night Vision instead of Speed. There are 5 durations of speed suspicious stews obtainable.
Obtaining
Crafting
Speed Suspicious Stew can be obtained by crafting it from 18w43a to 1.14.3. The recipe is shapeless: 1 poppy, 1 brown mushroom, 1 red mushroom, and 1 bowl. Crafted Suspicious Stew is always 6 seconds in duration (120 ticks).
Brown Mooshroom
This method works in versions 19w08a (brown mooshrooms added) until 1.14.3. To get it through this method, a brown mooshroom needs to be "milked" using a bowl. Suspicious stew from brown mooshrooms is always 6 seconds in duration (120 ticks).
Shipwrecks
Speed Suspicious Stew can be found in shipwrecks. This works from 18w43a - 1.14.3. Suspicious stew appears in the "shipwreck_supply" loot chests. Their durations are evenly distributed between 7, 8, 9, or 10 seconds (140, 160, 180, 200 ticks respectively).
Villager Trading
Expert level farmer villagers can trade suspicious stew from 19w11a (1.14 snapshot) - 1.14.4 Pre-Release 6.[1] This is the only method to get speed suspicious stew from 1.14.4 Pre-Release 1 to 1.14.4 Pre-Release 6. The duration is always 8 seconds (160 ticks) except in 19w11a and 19w11b when the duration is only 8 ticks due to a bug. A villager with any of the 4 speed suspicious stew trades will update to future versions allowing the player to continue to get these types of suspicious stew without duplication.
Testing
Speed Suspicious Stew is an indirectly observable discontinued feature. It can be differentiated by using shift + double click, as this will transfer only the suspicious stews with identical NBT data between a container and the player's inventory.