Sometimes I will (try to) load a world, and instead of the world, well, loading,, it gets stuck on "Done!". Sometimes the world will still load if you wait long enough, and sometimes it will just crash after a while.
Here is a video. In this case, the game just crashed.
(and yes, I searched this, but couldn't find anything.)
Could you please include information about your device? Without it we may be unable to reproduce the issue.