Is there a problem with the mobile app at the moment?
Have been using the app regularly then missed a day on Wednesday and now find I keep getting thrown out?
You don't say whether you are using iOS or Android or how you are getting thrown out.
I had a similar experience a couple of weeks ago on my iPhone and the problem was that my memory was getting quite full. I removed all unused apps from RAM and it worked fine. Perhaps your problem is memory, just a thought.