I have assigned the Scroll wheel button to "Keyboard shortcut: Delete". In Premiere Pro, I have set up a shortcut for Alt + Delete, so that when I click Alt + Scroll wheel button (Delete), it activates that shortcut. But if I keep holding the Alt button while clicking, only the first click is registered as Alt + Delete. The rest of the clicks are just registered as Delete, even though Alt is still being pressed. It doesn't behave like this when using the regular Options app.