Game randomly exits you out

Game randomly thinks you pressed save and exit and brings you back to the worlds list, this almost gave me a heart attack because I was playing in the dark, I have been associating this with mobs the first time was when I was going to get a music disk that went though my wall and before I picked it up it made me leave and the second time I was trying to push a villager up some stairs. This is really annoying and scares me, I don’t know if I can recreate it because it is so random.