Floodlight cam detecting person as motion

I have 2 Floodlight Cam Wired Plus that I have had for over 1 year.mInitially they were great and always distinguished when it was a person vs when it was motion (as I have motion notifications off).Over the past few months, they seem to both be regularly detecting people as motion, and so I don’t receive the notification.There has been no changes to their settings, always updated to the latest firmware and restarted periodically. Looking back on an example video, where it has detected a person as motion, there is no clear reason why they are not detecting a person as a person! I am getting to the stage where I feel that these are a waste of money.Any suggestions on why they are now struggling to distinguish a person? Has the firmware changed in the last 6 months on this? I have tried altering the motion sensitivity etc. but no luck.