I think this is because the server knows the client is dead, but the client tries to fall. But since the client is dead, the server doesn't allow that, teleporting the player back. The player then tries to fall again.
happens on 1.17 as well
I think this is because the server knows the client is dead, but the client tries to fall. But since the client is dead, the server doesn't allow that, teleporting the player back. The player then tries to fall again.