Filter does not release button when inactivated

[nicolai0]

Hi

I want a modifier key B such that button A maps to either 1 or 2. So I have a button->filter mapping from B to the filter and I have two button->button mappings from A->(filter off)->1 and A->(filter on)-2. If I press button A and then hold the button B and then release button A then button 1 will still be active. Is there any way around this? I want button 1 to be released as soon as the filter button B is pressed.