Quartus cut paste not working

Yes, indeed block diagram/schematic (.bdf file). On another, a bit older, laptop also running Win10, it is working ok.

If I open another design, sometimes, very sometimes, the clipboard is filled and paste is not greyed out. But only for larger selections, it still does not work. It seems to me some process/service/policy is preventing the clipboard to be filled, but I do not have the knowledge of all processes that are running.