When rocketing around while using an elytra (and firework rockets, of course), if you fire a rocket up, and then quickly look in a different direction (ex: sideways), you will lose connection due to "Invalid move player packet received"

I'll note that I'm playing this in Singleplayer.

Edit: It appears that crashing into the ground while looking up (while flying with the elytra) also throws this error. As does looking up while having a high enough downward speed.