The Bug:

Non-controlling passengers on sitting camels cannot adjust their rotation a full 360°.

The controlling passenger on a sitting camel can adjust their rotation a full 360°, while the non-controlling passenger can only adjust their rotation 320°; this is inconsistent. The camel doesn't move when it's sitting so it would be expected that both players that are passengers of the camel would be able to rotate their heads a full 360°.

Steps to Reproduce:

1. Get two players and label them "Player A" and "Player B".
2. Summon a camel with a saddle already equipped on it by using the command provided below.

   /summon minecraft:camel ~ ~ ~ {SaddleItem:{id:"minecraft:saddle",Count:1b}}

3. Wait for the camel to sit and when it does, get "Player A" to mount the camel first, and then get "Player B" to do the same.
4. Get "Player A" to attempt to adjust their rotation a full 360° and take note of how they're able to do so.
5. Get "Player B" to attempt to adjust their rotation a full 360°.
6. Take note as to whether or not non-controlling passengers on sitting camels cannot adjust their rotation a full 360°.

Observed Behavior:

Controlling passengers can adjust their heads a full 360°, while non-controlling passengers can only adjust their heads 320°.

Expected Behavior:

All passengers would be able to adjust their rotation a full 360°.