Zwift failed to write fit file to activity

Just finished a FTP test immediately after updating Zwift. But the fit file was neither uploaded nor written to the disk (inProgress file did exist, but it was the previous activity). I’ve checked user\Documents\Zwift\Activities\ folder.

Reproduced this issue once. (Immediately after I found this issue, I started a new workout but found nothing in the activity folder).

After I ran zwift in administrator mode the issue disappeared. (either in or not in administrator mode)