Hotbar auto disappears

For some reason, when I play Minecraft on my iPad Mini 4, the hotbar just disappears after 5 seconds, with no notice.

Please fix it, as its really bothering me,

xe

 

 

_Video of bug here: https://share.icloud.com/photos/0lbbtOzD3yPmFR5_8-w4-gN6A_