When you try to close a file while a background task is running you get a warning (Screenshot A). The word "cancel" appears there 4 times, so a fast reader would think clicking on "Cancel" will cancel something. But that's wrong. If you click on "Cancel", the window is closing. Nothing else.

So please change the button to "Close" (and in the German version to "Schließen" instead of "Abbrechen") to make clear nothing is cancelled.

In addition to that it would be nice to have a second button that helps the user to get directly to the background task panel. (Screeshot B)