Horses don't receive fall damage while mounted and take all accumulated damage once dismounted

[deiphiz]

Describe the bug

When riding a horse, it does not appear to take any fall damage whatsoever. However, upon dismounting it would appear the horse receives all the fall damage it would've taken all at once, and if it's enough, it will kill the horse instantly.

To Reproduce

1. Tame a horse and ride it
2. Jump off a cliff with the horse a couple of times
3. Dismount the horse

Expected behaviour

The horse should take damage immediately after a fall. It should not be receiving damage upon dismounting.

Server Version and Plugins

Purpur 1.21.4-2376-4bf1b98 (MC: 1.21.4)
Geyser is the only plugin

Geyser Dump

https://dump.geysermc.org/872ytybYcViBSm5PwW3kGvuXQTZbbTRA

Geyser Version

2.6.0-b742 (git-master-ddd1afa)

Minecraft: Bedrock Edition Device/Version

1.21.51

Additional Context

Players initially described this behavior as "random", but I was able to reproduce it pretty consistently as described.