I‘m not sure, either. After the last watchOS update it was okay for a few days, but then the issue came back. Today I noticed no time lag, but I think it‘s too early to be sure unless there is an official confirmation by Apple.
It hasn't been fixed, my watch is still doing it. There was no mention of it as a bug fixed in the release notes nor has Apple ever acknowledged it was an issue they were aware of.
I've had the AoD-not-updating issue since I bought the S6 when it first came out.
It was happening almost every day and usually more than once per day.
Since the 7.4 update I have not seen it happen, so I am cautiously optimistic that they have fixed it (at least for some of us).
If you have any updates on your S6's behaviour please report! 🙂
I have that same problem. I'm not sure if watchOS 7.4 or 7.4.1 has fixed it, but after updating to 7.4 there is new problem. The screen flashes and usually it happens when I raise my wrist, but not every time. Does anyone else noticed this kind of problem?
Can confirm that the problem was not fixed with 7.4.x. On the watch faces themselves I didn't notice the problem anymore, but just before updating to 7.5, the digital time in the Workout app jumped from 17:05 to 17:07. Then checked the watch face and it was already ~17:07:40.