XBOX Account Crash

When I tap on the app, i always go and join a world. Then after like 10 seconds of walking around i always crash and sometimes it tends to restart my phone. I figured out and it has to deal with my XBOX account. The first time i updated to 0.15, i signed into my account. After i played with it, i took it out of my backround. Then when I go back, it says "Sign In". I just skipped it and joined a world. Like after 5-10 seconds of playing on the world, it crashes. Then i went back to the app and i was thinking that it had to deal with my XBOX account. So i just waited up to 1-2 minutes for the "Sign In" tab to be gone and after that, it works perfectly normal. Please fix this bug. I dont like my game crashing all the time. So please, fix it. (DEVICE: BLU Vivo Selfie)