https://bugs.winehq.org/show_bug.cgi?id=38626
--- Comment #17 from Nikolay Sivov bunglehead@gmail.com --- (In reply to Ronny Standtke from comment #16)
Created attachment 60586 [details] screenshot showing the disappearing upper level menus
I tested with a backported Wine 3.2 in Debian 9. The good news is that the submenu no longer disappears. The bad news is that the upper level menus now disappear and become grey boxes (see attached screenshot).
Hi, Ronny.
Did you try the same on Windows? I think that's how it's supposed to work. When you select different style in popup menu, main popup is dimmed so it's not obscuring your document area and you can see your new selected style temporarily applied to your text. Boxes should be of some level of transparency though, not solid grey. From your screenshot it seems to be working correctly, try to add more text so main popup could cover some.