Ring doorbell rang by itself at 1:23AM inside locked gated area

I'm using Video Doorbell(1st gen) and for the first time, it rang by itself. This battery operated doorbell is on locked down area where no one can come in unless they have a ladder. I checked and no one is in the small area and the video shows no one as well. Seems like the doorbell is acting up. Batter level is showing in yellow but still, it shouldn't ring the video doorbell automatically. Please let me know what is going on with the doorbell? Is this a known/reported issue nowadays? Ring doorbell going off randomly?