False alarms (especially after a genuine detection)

Bought and using three Eufy Cam 2s for a few months now. The one covering our front has been a challenge getting sensitivity right to detect and record a visitor early enough to record their face rather than top of their head but not triggering every time there is wind and rain or movement on the road / pavement at end of our drive. We might move this camera to side-on and buy a video doorbell for front-on but can anyone suggest another solution?

Another issue is that we often get false detections flagging repeatedly for several minutes after a genuine detection has been and gone. There is nothing obvious in the field of vision and certainly nothing different from the normal background that does not trigger detections. Am I missing something obvious?