I see you are using an iPhone. Did you update the app or the doorbell FW recently.
There have been other posts regarding problems with the detection zone for the doorbell. I seem to remember more problems being reported with the iOS app.
@kae4560 recommendation to turn off notifications temporarily may calm the annoyance until the next update.
However, I have the VDBv1 operating on an older, more stable FW version with Android app (130), also an older, more stable version and my detection zone is working.