There are many glitches and bugs in my MCPE Android 11 gameplay. It's not even working properly.

There are a lot of bugs, for instance I can't swim in the water, I can only sprint on it, and then when I come over to the land I suddenly  start swimming. I can't pvp, nor build or dig, the tnt won't set off or blast. I can't kill animals. I can't shoot arrows. This was happening since the previous version. I have attached the video(sorry for the quality. I had to compress it to under 10 mb to upload.  I will upload the YouTube link to the original quality video). Please fix . Please help me