Rumor has it that your browser window is still spinning up.
(Must be fixed, as I didn't get this error)

Yea, I guess I can connect the mouse to another computer to see if it has anything to do with the mouse software.

I've got a Logitech MX Master 2 and I have seen the same problem on other websites when you flick the scroll wheel. Just tested on Jamf Nation though and didn't have the issue.

@PatrickD nice avatar. :)

Yea, the MX Master 3 has a scroll wheel design that breaks the mold.

Guessing the issue was resolved, it doesn't happen anymore.