cancel button in update dialog does not work

I had version 3920 and wated to update to version 3921. After pressing download, the cancel button foes not work. Is this intended?

Yes, this is normal, as that dialog is not threaded, and therfore it is impossible to keep the GUI responsive. Anyway, what's the problem here?

There is no specific problem.
I think it is a bit unituitive that the cancel button can not be pressed.
I was a bit scared, because i had unsaved tabs, but the program asked me to save them before restarting . So no real issue here. Maybe just cosmetics