The bug
Recently I've been testing some vanilla Custom NPCs with the "{Passengers:[{id:"MOB"}]}" tag, and I couldn't help but notice when the lower mobs head was able to turn 180°. This happens with mainly humanoid mobs. It also only happens when the mob has a Passenger Via Passenger tag. I've provided some images that show what this looks like.
How to reproduce
/summon minecraft:zombie ~ ~ ~ {Passengers:[{id:zombie}]}Linked issues
duplicates 1
Attachments
Comments 15
This is still present in 1.14.4 full release.
I have not tested for all mobs but found that cows display this behaviour as well when ridden by another mob.
5 more comments
Can confirm that this is still an issue in 20w49a. To make this easier to reproduce, you can use the following command:
/summon minecraft:zombie ~ ~ ~ {Passengers:[{id:zombie}]}Duplicate of MC-181435 since this ticket has an assigned "Mojang Priority".
Please do not mark unreleased versions as affected.
You don't have access to them yet.