If you put a lead on a Parrot, it will proceed to fly towards you even if it is sitting down.
https://youtu.be/3kGWCkzWXDc
(video was failing to upload to Mojira)
Environment
Vanilla Minecraft Single Player World (1.21.10 & 1.21.10_rc2) & tested on a Fabric Server (1.21.10).
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Comments
1
Tyler
(Unassigned)
1531449
Confirmed
Expansion A
Normal
Mob behaviour
1.21.10, 1.21.11 Release Candidate 2
Retrieved
Tested + Confirmed!
After testing this out on 1.21.11 and then the same for 1.21.1 I can confirm this exists! This does look like a bug and it should be taken care of.
Video proof: