Motion Tagging for that single frame indicates that it’s touching or encroaching upon your Detection Zone:
If you watch the event video, as the motion triggering that event changes from frame to frame, that green box should move, expand, and contract, and at some point it probably visibly crossed the line into the Detection Zone. You might want to try enlarging the excluded (grey) area to give the Detection Zone more of a buffer.
You’re seeing the Customize Detections screen and the Other Motion line because on the previous screen you have selected All Events instead of Smart Detection Events. When you have Smart Detection Events selected on the Event Recording screen, this option changes Customize Detections to Customize Recordings and the Other Motion line becomes unavailable. What happens if you navigate in the app to select your Cam Pan v3’s Settings ➜ Event Recording ➜ Smart Detection Events and also maybe set a Detection Zone ( Settings ➜ Detection Settings ➜ Detection Zone)? That might be tricky unless you’re primarily using your Cam Pan v3 as a stationary camera. (I don’t, so I haven’t ever used Detection Zones on my Cam Pan v3s.) Some more detail about how you’re using your camera and what you’re trying to accomplish might be helpful.
Welcome to the Forum, @mccasa.iot & @imsiddiqui! 