I notice that my new cameras notice and record motion, for example a car arriving, but do not record that same car leaving shortly afterward. It is puzzling. The cameras has an SSD installed if that matters.
If you are referring to the 12-second event videos (Events tab in the app), then that would be because there is a 5 minute timeout after each event before the next event will be recorded. This is what allows Wyze to provide 14 days of cloud storage for free.
If you are talking about SD card video (View Playback from the live stream view), then this should not be happening.