I have a Wyze Cam v2 monitoring the driveway. There was a period of about 1 hour where nothing was recorded, despite monitoring being enabled. I definitely know there should have been movement given that the last video was of a vehicle parked in the driveway, and then the next video (about 1 hour later) was the same vehicle returning - between these recordings, there was no recording of vehicle leaving the driveway. During this same period, I also did not receive notifications, which I discovered was due to Wifi being down.
Does monitoring depend on notifications being sent? When the Wifi came back up, I started receiving notifications again for current movements, but not for that 1 hour period.