Thanks for your help! I had the coordinates unlocked add-on, and when I took it off, everything displayed correctly.
The same thing happened to me, and the way I fixed this was I backed up my worlds onto a computer, deleted Minecraft PE INCLUDING the texture packs and mods. Reinstall MCPE and re-add your worlds and it shouldn't crash anymore. This is caused by some texture packs and mods from 0.15.0 and 0.15.1 aren't compatible with 0.15.2.
Actually, I fixed it. It was a texture pack I was using that was meant for 0.15.0 not 0.15.2. So there's that.
I have not signed into Xbox Live. I have had to uninstall then reinstall MCPE 3 times and it only works for about 2 minutes before it crashes and then keeps crashing after the "Mojang" logo every single time. I have no idea what is going. If uninstalling then reinstalling MCPE 3 times now hasn't fixed it, what will? I'm up for any idea.
So I did that and it worked for a few minutes, and then it went back to crashing. I was changing the settings in MCPE back to what they were normally, and when I switched off "broadcast to Xbox Live" it crashed.
Oh, yeah. I have updates automatically downloaded, so I might've had MCPE open at the time.
This was happening to me too. I'm glad that I'm not the only one having this issue.