FIX! Been putting up with this issue/bug for years now and I think I've just accidentally stumbled upon a workaround - If you go to the hamburger dropdown menu in the comp window then go to 'panel group settings' then check the option 'stacked panel group' then the window doesn't scroll from the mousewheel / magic mouse swipes! And you can now just use , and . to zoom in/out as you usually would. I'm not exactly familiar with the 'stacked panel' layout option so this may have some unintended behaviours in the comp window but it's definitely working as a fix for the annoying scrolling issue for me. Not sure why this option would remove this function exactly? But anyway, hope this works for anyone else out there that's been dealing with this annoying issue for so long!
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