https://bugs.winehq.org/show_bug.cgi?id=52078
--- Comment #4 from Victini v_winebugs@outlook.com --- Happens on Wine Staging 7.7 on Arch Linux, too. Same configuration except with dotnet48 instead of dotnet46. I get a System.NotImplementedException when dragging tabs on MusicBee, as well.
It's worth pointing out that this doesn't just affect the tabs in MusicBee. Most things that can be dragged on MusicBee will result in the same E_NOINTERFACE/System.NotImplementedExceptions, such as images in the Album Covers and Artists views, and track names when an album in those views is selected.
What may be related to this is an issue I've had with playlists in track views. On MusicBee, you are able to drag the tracks, to change the order they're in or drag them onto other playlists. Whenever I try to drag them, I get a lot of DragSourceHelper2_SetFlags stubs:
0104:fixme:shell:DragSourceHelper2_SetFlags (1071F858)->(00000001): stub 0104:fixme:shell:DragSourceHelper2_InitializeFromBitmap (1071F858)->(00A6E4C0, 08FEDFB4): stub
I'm happy to provide the entire log here or file it as a new bug, but considering it's an issue with dragging in general, I figured, might as well post it here.