Remove the refrigerator magnet from the underside of the flex mechanism
What does that have to do with the scroll, which is on the opposite side of the device?
I'm not going to tear apart a new $70 mouse on the off chance that something unrelated is going to fix the problem.
In addition to the scroll "going to sleep" when it feels like it... this mouse also seems to "let up" off of down-clicks, and then immediately re-clicks. At least that's the way Windows sees it... which makes dragging operations fail and/or do very unexpected things.
Definitely not a good mouse. I had a bluetooth mouse probably 3 or 4 years ago that had zero problems... back to that one for now.