Empty Screen

All the time when I'm joining someone's world or a server and rarely my own worlds, I would get the part of the screen that said "locating server/generating world" and then after like 3 seconds suddenly its gone and it never comes back, its just gone. Then I wait for 10-20 min and its still there! And its very annoying because I am not as flexible on MCPE than Win 10 Edition and this has happened since 0.15.0 and it is quite annoying. Also I can't back out of this screen either so it pretty much gets stuck like this forever until I close it. Can you please fix it?