I use triathlon m720 for several years (win10 and 11). months ago scrolling wheel stopped scrolling. I tried to re-install logi+ app, remove mouse drivers, google for solution. I had to buy different mouse. I couldn't care less about all the smart functions of logi+ app if this very basic thing isn't working. long time ago I had exactly this problem, but after several weeks it was ok. not this time. Huge disappointment, I expected more from firm like Logitech.