mouse srcoll malfunction

I’m having trouble with the mouse scroll.
Scrolling though items in a fps half-life game seem not to register all the time.
It would get stuck between secondary or primary item but then it would skip as if its not function smoothly.
It’s not just for my mouse but for others as well.
For desktop use there’s not a problem.
How can I fix this?
openSUSE Tumbleweed_64 bit KDE Plasma Desktop