I had a vault with about 150 members and 5 Mr. Handys. So, after the newest update (auto-update) there was the option to select Cloudsave. So I hit the option and after that I loaded my vault. As I was in it was reseted to the beginning.

HTC One M8

Android 5.0.1

Not reinstalled or anything else like that.

Thanks for all help that'll come!