Issues with touch function stopping all together

I’m working on an ipad 2, idk if that’s the reason, no other app has ever done that, i have a lot of apps ( not running at the same time )
It’s weird because some days it doesn’t happen at all, other days I have to quit Cubasis to get the touch function back several times. Sometimes I go to stop a song and nothing works. Maybe the next update will solve it for me.