I've had a couple of users of my CIQ watchface report problems on their Fenix 5X+ since the firmware was upgraded to version 9.10 - and I've experienced the same thing myself once (but apparently they experience it all the time).
After starting an activity or app, then when they exit that and return back to the watchface instead of running my CIQ watchface as expected it runs the stock watchface instead. When they select the watchface again then it runs normally as expected.
The one time I experienced this there was no information in the log file on the watch at all ...
I haven't rebuilt the watchface since before firmware 9.10 was released - so it must be due to some change in the firmware itself which is causing this.
Has anyone else had reports of this happening for other watchfaces?
Does anyone have any idea what could be causing this?