I was messing around with my multiplayer LAN server and I started to teleport higher and after teleporting something like 10000000000000000000000000000 blocks in the air I got a message saying 'illegal stance' I have tried to move the players position using MCedit with no success maybe a way to fix this could be to when illegal stance shows up to teleport the player to the ground
Duplicate of MC-15289, please use the search function to see if your bug has already been submitted. Currently over 57% of tickets are being resolved as duplicate.