mouse wheel randomly stops working

This is very annoying…
The “mouse wheel” on my laptop randomly stops working and does not work again until I reboot. By “mouse wheel” I mean the section of the touchpad along the right border that normally functions as a regular mousewheel does, to scroll a page, etc.

Obviously I need to pinpoint what causes this but until I can do that, any suggestions? Configs / relevant logs to check?

Thanks!

bump. Just happened again, this is really frickin annoying cuz I have to reboot…