Also....more important is why the filter pop up is on the other screen?
You've identified a bug that we'll have to fix.
-Kirk
I also noticed that when PM+ on my Mac laptop is fullscreen and using it's own "Space", the "Variables" window, if popped-up, opens on the other (default desktop) "space" and switches to it even whenever I try to switch back to the PM+ space. I think I've seen this with other PM+ dialog windows, too, but won't be able to report them until I replicate the behavior and identify which others I've actually experienced this with. This seemed related, but if you'd prefer, I can start a new topic with it instead.