I have noticed that my screen is doing weird things only during a workout. It usually starts out going blank during an alert (last lap/HR/up next) and then comes back on. Then after a while it will just go to AOD off with gesture for the rest of the workout. And this isn't every workout. It seems that if I power cycle the watch it resolves for the next workout but then goes back to the strange behavior.
Possibly unrelated but when I then gesture during alert, some alerts are either not persisting long enough or the gesture is delayed to turn the screen on, causing me to miss the alert. It could be a function of having 2+ alerts happening at the same time also during vibration (last lap and up next, competing for screen time).
In regular activities, not a workout, the AOD is working properly.
Settings:
General Use: AOD off, medium brightness, alerts on, wrist gesture on, 8 second timeout
During Activity: AOD on, medium brightness, alerts on, wrist gesture on, 8 second timeout
Firmware: v8.21
I searched the other AOD issues and didn't see anything specific to workouts.