When joining another players world and using an elytra, you yourself have normal animation. When the other player uses the elytra and starts gliding, the only animation that plays is themself looking up and the elytra wings opening while the player model is in a standing position.

Steps to Reproduce:
1. An android player joins your world. (Or a windows player to an android player)
2. Either one equip an elytra.
3. Start gliding.