I think I finally figured out how to reliably reproduce this issue!
- Add the large noise complication to a watch face. It should always show real time measurement bars when the watch is awake
- Restart the watch (to make sure the noise complication is working… when it stops working, the only way to restore function is a restart)
- Have someone call you and answer the phone call on the watch
- during the call, bring up the keypad and tap some numbers randomly
- Hang up the call and put the watch face to sleep
- Wake up the watch. The noise complication should show the measurement bars for a second and then it will grey out and say “measurement suspended”