Samsung Watch Active2 shows constant activity, even when not wearing it

[Dhali]

Yesterday my Active2 watch started to live it's own life. The watch thinks I’m constantly moving (even when i'm not) and it doesn't even recognize it as a sport - this happens even when I’m sitting, sleeping, or I don’t even hold the watch in my hand. Both phone and clock activity tracking shows the same, completely absurd data on calories as well as activity. I already tried to boot the watch and reinstalled it, but the same thing continues. Also checked that I'm using the most recent version. Any ideas what to do or try???  

Below two pics from my phone's view (much easier to see) from today (haven't been for a walk or done any exercise..)

[QXtaRAir]

maybe someone else was wearing it while you werent looking

[Steven9761]

Try clearing the cache for the health app.

[Dhali · Accepted solution]

Solved it. For some reason yesterday's exercise didn't stop properly and continued on and on (the watch didn't show this but I remembered this thing started after an exercise). Reporting/starting a new exercise  and stopping it finally solved the issue. 

Truly it would have been much more exciting if it were gnomes using my watch.   Sadly the solution was quite mundane.