No Person but showing that there is

My camera has started notifying me of person detection every so many minutes and there is no person visable. Reason?

Welcome to the forum.

Is there anything on the clip? Dog, bird, bug, cloud?
Is the camera inside or out?
Which camera model?

Nothing on the clip, it’s always been good just started not long after update. It’s the v2 and I have it on my patio.