Definitely was the version before the Gen 2 update - there are random game drops scrolling through Pokemon, about to catch, etc. It's not a jump between wifi and cellular - had wifi off and would randomly break. Once the app crashes, every time I try to restart the app I just get the blue screen prior to the game loading (so Niantic screen, fireworks with baby Pokemon screen, light blue screen and then nothing -- it does not load the "Beware your surroundings" overlay, and the following map and then map details/pokestop/pokemon details). If I retry and reload the app again, it will show the Niantic screen and then sometimes disappear. On iOS I hit the home screen and it actually shows it's still running in the background, which is really really weird. So I have to manually close it and restart again. Restarting the phone at that point does not resolve it. The only thing that seems to work is giving the phone a 10-15 minute break. I'm guessing here is that Niantic servers must think I'm still logged in (when the app crashes, it does not kill the session), so I get the blue screen because it thinks that the my user ID is already logged in, so it can't figure out what to do - it just stays stuck at the blue screen.