Flying with elytra into void results in weird flying/normal state after respawn

I was actually using 1.12, but this probably still works in 1.12.2; flying with the elytra into the void results in a weird state where the flying pose is being used but you are still able to move and jump around normally (albeit flying physics kick in at some point and you jump with less gravity) after respawning. No clue why this happens. Should note that this occurred on multiplayer.