Minecraft Framerate and Crashing Issue on IPad

After installing the latest update (1.16.220) my game continuously has frame rate issues. I connect my PS4 controller to my iPad and it keeps randomly disconnecting, and the game will even sometimes crash. I have no other apps open on my iPad, and am not playing in laggy servers etc. I don’t know why this keeps happening as I have checked everything! I hope Minecraft support can help