I just bought a Logitech G603 Mouse. As is the case for my trackpad, I have actions set to only activate over the dock / menubar. The problem is that I also need to assign a 'neutralizer action' (set "use apple default of do nothing") otherwise I'll see the artifact mentioned here: https://github.com/folivoraAI/BetterTouchTool/issues/2121.
Anyway, currently my biggest issue is with the scroll wheel. I'd like to have it do things over the dock / menubar and not have that artifact appear the rest of the time, therefore it would be great if you add scroll up / down to the predefined actions.