Hello,
Essential information first:
Device: Fenix 5x+ Ti DLC
Software version: 5.10
GPS version: 2.30
Garmin Express on OSX 10.13.6 High Sierra
Problem description: Whenever I set the backlight timeout on the device by going to Settings >> System >> Backlight >> Timeout to any value (including "No Timeout"), it changes back to 4-second timeout everytime I sync with Garmin Express (on OSX) or use Android File Transfer.
This does not happen when I sync with Garmin Connect on Andriod.
Is anyone else experiencing this?