When cleaning shulker boxes that are in a stack greater than 1, cauldron deletes the entire stack.
Steps to reproduce:
1. run the command:
/give @s minecraft:white_shulker_box[minecraft:max_stack_size=64] 64
2. place a cauldron with water:
/setblock ~ ~ ~ minecraft:water_cauldron
3. Try cleaning the shulker boxes, and observe that only 1 shulker box is cleaned, replacing the other 63.
Expected behavior:
the cleaned shulkerbox should be added in a differnt inventory space, instead of replacing the entire stack
Linked issues
relates to 4
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Carretero Martínez
gegy
Can confirm. From my testing, this does not apply to stacked dyed armor, or stacked banners with a pattern.