Will format as you suggested after it fills up again and fails to overwrite.Firmware 1.11 should be released this month to fix a compatibility issue with Dashcam Viewer.
@leggy
Card Full errors generally mean the card is corrupted in some way. I'd use SD Formatter and select the "overwrite" option to reset the card back to factory defaults.
If no error message put it card back in and Format in-camrea after that. (and re-test)SD Memory Card Formatter for Windows/Mac | SD Association
www.sdcard.org
Is Dashcam viewer compatibility issue the only issue being addressed in the new firmware release or there are other enhancement as well?