Track Addict Pro stops recording before my road course track session is completed.

I have experienced two issues with the Track Addict Pro app. I am running a red dot external GPS and a Kiwi 3 OBDII device. (1) Sometimes the recording ends early during md session for no apparent reason. Why does this happen and how can I fix it. (2) Sometimes I don't get any individual lap detail or predictive lap times, I just get "segment" data, why? I just ran at COTA this weekend and can't understand why some sessions everything recorded and other times the recording cuts off mid session.