A texture bug that will come if you turn your mobile device on and off.

So I accidentally turned my iPad off and as soon as I turned it on and joined my world many textures had a very wheird design (see link) I had no texture pack in and no other packs.

it was very wheird so I restarted the world and every thing was normal again. 
so I looked in the Inventar and everything was wheird

i hope I can help you with that a little bit and hope you can fix that very soon

have a good day