I'm having the same issue, hourly chime dings between 10-20 times on the hour, over about 5-10 seconds. it does this when set for sound or vibration, doesnt seem to make a difference.
I have the exact same issue, hourly chime has become demented since the OneUI update. Is there any progress toward fixing this issue? It's really irritating and the hourly chime is nearly a "must have" for any watch I wear, especially one that costs this much.
So I have the issue as well. Followed supports advice. It worked fine after doing it and I also got a new hourly chime I wasn't aware of being updated after One UI because I still had the old one after the update. After a day or two suddenly I heard a beep like a alarm clock type of beep and I wasn't really sure what it was but after getting a sound that repeats itself multiple times in a few seconds I got that it was from the watch but with a new hourly chime again so I got two different chimes after following the steps by support but the issue is still the same. I've turned it off till a fix.