Maps placed in Item Frames disappear when returning to the game

When getting off and on my Minecraft pe survival world without switching game modes I repeat without switching gamemodes so nonone gets confused
this is on my efun next book ares 8 android tablet running android 5.0 please fix this.

gatharian added:
Steps to reproduce
-Be sure to open your game fresh. (I'm using a creative map.)
-Place an Item Frame on the wall.
-Place a Map inside the Item Frame.
-Press the home or sleep button on your device.
-Return to the game and you will notice how the Map disappeared showing a frame on the wall.