Multiple functions does not work - Doorbell 3 Plus

Over the past two weeks I have received extensive amount of false alerts and also situations when the camera failed to capture video when there are people really walks around my front door. Functions that are not functioning are: Pre-roll, People Only Mode and Motion Zones.Pre-roll, it worked only for the first few days after installation. The Pre-Roll function is enabled under the Video Setting, and this has never been changed. For no reason it just stopped working, and I have no clue what was the cause.People Only Mode, I have not yet noticed a significant difference when turning this function on/off. As you can see from the video attached, the camera is still catching false alerts for a vehicle passing by (which is far out of the Motion Zone too!) Furthermore, when postman deliver mails, the camera demonstrated a significantly amount of delay in responds to the presence of that post man, which is also shown in the other video attached. The video did not start recording until the postman has walked away.Motion Zones, for the same issues described in the paragraph above, I do not believe motion zones are really functioning in the way it is described/advertised for.