I own a Garmin Fenix 7 Saphire Solar with the newest Firmware 7.35
When going through the glance loop, it was impossible to came back to the watch face. The watch and the touchscreen was working but only in the glance loop. The back and all other buttons didn't work. Even the long press for controls menu or the shortcuts didn't work. I could only scroll up and down in the glance loop but nothing else.
Connecting to Garmin Express didn't work (watch was no more recognised).
The only solution I found was ti force a reboot by holding down + back + start + power button for several seconds. After the reboot everything works well again.
Crazy, isn't it?