Mounts (including boats) now have input latency and turning is slow and jittery

Assuming this is happning because of changes made to allow mounted mobs to swim, horses, donkeys, mules, and camlels are much less responsive to inputs than before, turning is slow and delayed, and jump timing is delayed. Boats have input delay, and the rider’s view rotation when turning the boat is jittery (more noticeable while riding on ice). this makes faster horses, donkeys, and mules almost unusable, and riding boats on ice much more difficult.

Steps to reproduce:

1. Ride a mount (horse, donkey, mule, camel, boat)

2. move, turn, and/or jump

Expected result:

Moving should be immediate, turning should be immediate and at the same rate as the rider’s view rotation, and a jump should begin immediately upon release of the jump key/button

Actual result:

All listed actions have significant delays, desync, and are very unresponsive.