Bluetooth Keyboard not working

Hi There!

I use an iPad Pro 2nd gen and a ZOOK Finger Pad

Recently I figured out that you can play Mineraft iOS with iPad, so I tried it. After a few days minerraft suddenly stopped sensing my keyboard and only could sense my mouse. I have been trying to troubleshoot this issue, but nothing was working. Unlike MCPE-51263 , I an having trouble with the keyboard, not the muse

I use a Bluetooth keyboad
Here is the video link: https://www.dropbox.com/s/3vggpjd0j48b2ti/IMG_3151.MOV?dl=0