Watch ultra 2 locks itself when I'm wearing it

Under orientation settings, the watch Ultra 2 has been set to the left wrist, but when I wear it, it will constantly lock itself, so I need to enter the passcode. Also, when running with the watch, it continually pauses the exercise. Then I switched the watch to my right hand, and the two problems disappeared. This happens all the time. I had the same problem with watch 7, which I just sold. I don't want to turn off the wrist detection, as I keep credit cards on my watch. It is very annoying it is happening to 2 very different watches. Indeed, there must be a software issue. I don't think it is my left hand, but it can be that if a tattoo is blocking a sensor. Yes, I have a tattoo on my left wrist, but not the right one.

Does anyone have an answer?