Lose hotbar and health bar after using chest on kindle - mcpe realms

While using a kindle fire for mcpe realms. Sometimes, after using & closing a chest this happens: can see to the bottom of the world, when that clears, all GUI is gone. Have to leave the game and re-enter to get GUI back. Happened 12+ time in last week. Realm is not players own, owner had iPad 2 and does not have this problem.

From MCPE-15918:
Make a trap and test it, I fall into lava ( that normal ) but the hunger bar, amor bar, health bar with the inventory bar is missing after I fell into lava while I open the chest....