Player animations play at the wrong speed while riding an entity

Animations play at the wrong speed when a player is riding another entity. This is only seen on multiplayer, as a player's own animations play correctly.

I have added a simple looping animation to the player entity & recorded a short clip on my Windows 10 device of another player from another device (Samsung Galaxy S10) riding a minecart and a boat, his animation being sped up inconsistently in both cases.

Steps to Reproduce:

1. Create a multiplayer world
2. Have a second player join the world
3. Have Player 2 ride an entity
4. Have Player 2 punch the air, eat food, or use a bow
5. Observe the speed of the animations

Observed Results:
Player 2's animations are sped up.

Expected Results:
Player 2's animations should play at the same speed as when they are not riding an entity.