Did you set "Low Bitrate Recording" as the picture shown?
Do you power the dashcam through the GPS mount or the USB port on the camera body side?
Try a different power way from the current one, such as using the supplied car charger if you're using a hardwire kit, power it directly through the USB port if through the GPS mount now, etc.
Unplug the rear cable is also a recommended method to do a troubleshoot.
If trying the above still doesn't work, please
reflash the firmware. After changing the firmware, remember to
default the settings, and then press and hold the reset hole for 5 seconds to
reset the dashcam.
All the above is the way for a basic troubleshoot. please do it and let me know the result. Thanks!