Hi, was it after the 3.20 update? It’s possible the watch face you are using needs to be updated by the creator (unless its a garmin watch face?). If its a 3rd party watch face I’d try a different one and see if that helps.
Also, I do a hard reset after every charge to keep odd bugs from popping up. Hold down the A button for about 10 seconds until the watch powers off (past any emergency notifications). Wait for 5 seconds or so and then turn it back on.
