Going crazy?

Maybe a month or so ago my closet door broke in my bedroom. The doors are full-length mirror doors that slide. What happened was the back door's frame broke away from the mirror part. I didn't hurry to call maintenance to come fix the door because my bedroom was a mess. Plus, the door still basically worked. It was just a little tougher to slide it. It's been a few weeks now and I still haven't gotten around to calling. But yesterday I noticed that the door is fixed! I don't understand it! Did maintenance come in and do some sort of checkup and fix it on their own without telling me? Did it somehow fix itself? I have absolutely no idea but I guess the latter option makes more sense... maybe one time when it got pushed to the end of the closet, it reattached itself. But it sure is on there securely now and I had tried to reattach it when it first broke and it was way too heavy. So, so crazy. I wish I knew what happened.