I tried loading up my game while offline and it immediately crashed. I thought It was nothing and tried again. It almost loaded up and then crashed again. So I decided to see if it would work if I opened it on wifi first then took it offline. After doing that I was able to play for 5 to 10 minutes and it crashed again. I looked to see if this was an issue already reported for this version, but couldn't find anything. So here you go, one of your beta testers for MCPE telling you that something isn't right.