Warden AI breaks (becomes passive, starts spamming random animations) if you repeatedly update its entity data
Steps to Reproduce:
[Step 1] Summon a warden (use spawn eggs or /summon)
[Step 2] Place a repeating command block
/setblock ~ ~ ~ minecraft:repeating_command_block
[Step 3] Enter this command in the repeating command block:
/execute as @e[type=minecraft:warden] run data merge entity @s {a:1}
and set it to always active
[Step 4] Switch to survival mode and interact with the warden
Observed Results:
Warden becomes passive and may start spamming the sniff/dig animation.
Expected Results:
Warden's behavior should be unaffected by the change and it should attack all mobs around it.
Notes:
This affects map/data pack makers, preventing them from updating the warden's data too often because its AI might break.
Fixed as of version 1.21.4. I put the command you stated into a repeating command block and set it to always active, and I went into Survival mode and the warden's AI still works as he kills you.