Ding Dong

I was awakened at 5am to the doorbell ringing...?
Huh?
Wha..?
When I finally woke up enough to realize what was going on....I knew there wasn't someone at the door, as the button for the bell is on a small rectangluar plastic case, and it attached with double sided sticky tape.....which had lost it's adhesiveness (due to humidity?), and was no longer attached, I had taken it off and it was inside the house! It was just randomly ringing..? Not sure what that was all about, but I unplugged the mother unit so it would stop.