tried that - it does avoid the window shrinking, but now the menus (fixed and pop-up) inside Surge get completely messed up - they pop up in upscaled mode, then immediately shrink to un-scaled. And then the correlation between mouse position and selected menu item gets completely messed up. Not really usable.
And of course, the upscaled GUI looks awful and fuzzy…
For the moment I’m sticking with upscaling deactivated for Surge and docking the GUI. The GUI will still jump crazily whenever I switch to the Surge tab, but at least I can work with it somehow.
Unfortunately, issue not solved…
Cheers,
Torsten