Weird Teleport Bug

When you type in the command: /setblock ~~~ end_portal (and get teleportet to the end) then type /setblock ~~~ portal you get teleportet to the overworld but to world-hight 32765!

 
When you did this you can't place blocks or destroy them. 

You must close your world and open again to do this bug a second time. 

When you relog you spawn not in the place were you left the world.