Searching for "mouse wheel scroll" produced 111 results. The chance that I will read through all 111 of those if I am only slightly interested in the project is: zero percent. Instead I will submit a new bug as a bit of volunteering and leave the sorting out to the maintainers.
Not like one more dupe on a 20k list will make a difference. Broken window theory.
At the very least they could have a prominent top 10 trending bugs list or something. It would help keep the system from being flooded when a new build introduces an easily triggered bug.