In Separated Mode, with all most of my panels on my secondary screen, I create a new document. The New Document Dialogue Box appears underneath the panels.
It's confusing because, in most of the other software, the New Document Dialogue Box is a pop-over window who makes that one can not move the other panels. Here it seems like it's considered as another panel. It took me a while to understand that with the New Document Dialogue Box open I could still move around the other panels and paint on an already open document.
It might not be a bug, but I see it as a UI problem: One would expect the Dialogue Box to be floating above everything, as Dialogue Boxes tend to do.
Affinity Designer 1.8.2
Thank you for the great work!