No buttons on Screen Bug

Howdy. I would like to report a serious bug that makes me pass away the desire to play Minecraft because because of this bug, if I open minecraft the second time after installing it, it takes a long time to show the loading screen and after much more time still, when the loading is finished I see the background that turns but without the buttons. Luckily I was able to save the download file in an apk and place it in the internal storage folder. But it is still inconvenient that to play I have to uninstall and reinstall it, then I have to reconfigure it. So:the first time after installation works normally, but the second time it does not. I waited 5 hours and still nothing.