Players flying with elytra look upright

When another player is observed flying with an elytra, they appear to be flying upright even if they are flying in another direction.

How to reproduce:

Open a minecraft world and have another player join

Give one player an elytra

Fly in different directions while having the other player observe

Observed Result:

The player appears to fly upright regardless of the direction, and arms and legs swing too similar to flying in creative mode.

Expected Result:

The player should look like how they appear in f5 to all players instead of just themself.