Was in the middle of a strength workout when the screen went black. Long press of either of the upper two buttons brought the screen back, but then when I pressed the back button to go back to my workout it went back to a black screen. Tapping the screen did nothing.
Battery level was not low.
Rebooted the watch and it came up and went straight into the workout timer for the strength workout!
I'm two weeks out from a race and now I'm going to have to break out my old trusty fr935 because I can't trust this watch not to go blank.
Hardware issue? First time I've ever had this happen on any Garmin watch.