From day 1 when I bought my FR920xt back in 2014, there has been no satellite pre-caching via Garmin Connect Mobile (android). Because of this, it takes about 7 minutes for the FR920xt to connect to GPS satellites in training mode (and thus no GPS during warm-up).
(In contrast, if I connect the FR920xt with USB to a computer and synchronize using the Garmin Express, then satellite pre-caching is downloaded and the following 5 days the FR920xt connect to GPS satellites in a few seconds.)
Garmin Support had no solution, other than connecting the FR920xt to a computer every 5 days. So I wonder, when will Garmin implement satellite pre-caching download for the FR920xt via the Garmin Connect Mobile (android) app? Or, if it is implemented but not working, when will this be fixed?
Troubleshooting done:
I have uninstalled and reinstalled the GCM (then had to pair the FR920xt bluetooth again).
I have reset the FR920xt (by holding down the on/off button in 15 seconds).
I have installed the latest version of both the GCM and FR920xt software.
Sync statistics in the GCM:
Upload status = successful
Download status = successful (no item to process)
Time Sync status = successful
Overall Sync status = successful