Hey @Claireh11. Could you show us a video example of when you have motion at your Doorbell but nobody is there? This will help us dissect what could be causing this! You can upload the video to Youtube to share it here, make a share url by emailing/texting the video through the Ring app, or downloading the video and making it into a ZIP file to attach to your response.
I think I have the same problem... and it is not motion but actual ghost ring notifications. My doorbell basically rings pseudo randomly on its own... i can tell the difference when someone really presses the button because that will trigger my internal doorbell to go off as well where the false notifications only notify my ring app. Sometimes it goes days without a false doorbell notification and other times it will happen like every 15-45 minutes.. In the middle of the night no less! For instance, on 5/14 this happened 8 times between 1am and 4am. Since I am a member of the ring explorers... I wonder if this has something to do with that. Maybe some weird firmware was downloaded to my doorbell? I've had this since 2015 and it has only been acting up over the last year.