When you teleport whilst gliding, after a few seconds you will jerk back to where you teleported and lose all your momentum. This is not a duplicate of MC-90026 or MC-89994.
Video of the bug in action: https://www.youtube.com/watch?v=iKW39ysNmzs
Teleporting bug with elytra
Elytra permanent flight bug
Player is removed from the EntityTracker when teleporting to unloaded chunks or changing dimensions, resulting in client side desync
Elytra stops working when changing dimensions
Server spams "Player/Vehicle moving too quickly" to the log when players are using Elytra/Boats or flying at max. speed