I think you might be using Alchemist wrong. Turn on Listener and then create a mask. Check your filters in Alchemist and IIRC you have to select Listener at the top too (not at my PC right now). Then if you create a mask, there should be a make event.
Actually, when you are applying a mask you are deleting it with the flag “apply” so it will perform side effect before deletion. So I think this is correct.