ring video doorbell

We just moved and the geek squad installed our ring, but it goes off all hours of the night, but nothing shows in history and no one is at the door. It doesn't give the message that someone is at the front door. It is as if someone pushes the doorbell but no one is there. What could cause this problem? One night it goes off at 1am and 5am, the next night it is 7pm, this morning it was 6:15am. It's never the same time.