In Minecraft Windows 10, version 1.1.2, I had a weird crash. I was in the Nether and I got near the Nether Portal. I didn't intend to go through it, but I guess I got close enough that I started going through. I opened my inventory so I could put on some armor (I had just picked up after dying).

Instead of going through the portal, my game crashed. When I restarted, I was in the same position but I didn't have any of the new items.

I was recording at the time and the video is published here:

https://youtu.be/ecIdE207ZOI?t=25m57s

I get near the portal at about 26:10 in the video and the crash happens at 26:34.