Hey, FWIW, I've had this issue several times with the Xbox One version. And to @bbalpert's point, it was often in or around some Wrinkler activity, which is weird. Had one battle that crashed around seven times. Not great.
I eventually got past that one, but unless you want to keep repeating battles, it's probably a good idea to manual save before going into combat, at least until DF puts out some kind of patch.