@Colmr
Hi,
If the phenomenon is that you can receive vehicle detection notifications on your phone when the camera detects a vehicle, but sometimes no corresponding detection video clips are stored on the SD card, please confirm the following information for further analysis.
1. Please send us a screenshot of the detection notifications you received on your phone.
2. On the camera's Live View > Playback & Download > Playback > SD card page, please send us a screenshot showing that no corresponding video clips are stored.
3. Please send us the screenshots of the camera's Device Settings > Storage & Recording page and the Recording Schedule page.
If you have other phenomena, please describe them in detail so we can further assist you.
Best Regards