Two weeks owned Apple Watch model A2292, version 7.6.1 (18U70)
Apple Watch ECG App did work, stopped working for no (known) reason. Now when I start the ECG app, put my fingers on the crown, it just cycles from 30 secs, 29 secs, back to 30 secs and repeats. Red vertical lines flash on the left of the screen. Is there an actual (Apple) fix to this problem. Clearly it is a known and repeatable bug. Surely the solution is not - try this, try that..