I got a replacement Watch 3 a few days ago. I'd been using my 'old one' for about 10 months and the sensors started not working properly. The new one does better with the sensors, but now when I turn the watch off/on, the units in the Samsung Health App go back to metric even though I selected English units. That NEVER happened with the 'old one'. Anyone have any suggestions. It's annoying to have to change it every time. I know, I could just accept that, but I'm set in my ways at 79 years old.