If you spawn a nether portal in the end dimension using /setblock ~ ~ ~ portal upon going through the nether portal the game will spawn you at Y:32767 in the OVERWORLD but the game THINKS you are at the normal spawn in the Overworld ... after getting all the way down The game will always THINK you are at spawn but you can move around If you go to far away and attempt to break a block it will disappear no sound effects no particles no cracks nothing it just disappears mobs also try to go to where the game THINKS you are and if where the game THINKS you are is underwater you will also drown also if you /tp yourself the game will always the THINK you are at where you /tp'd yourself to. you also you will not be able to take damage and oh yeah if you break a block from too far away from where the game THINKS you are and the block was holding sand or gravel the block wont fall also you cant go through portals that are to far away from where the game THINKS you are Idk if this is enough info but i hope its enough for this bug to get patched. the only way to stop the bug happening to you after executing it is to reload the world. Extra info: you can only attack mobs that are close enough to where the game THINKS you are.