https://bugs.winehq.org/show_bug.cgi?id=56935
--- Comment #7 from matt@emenel.ca --- (In reply to Grazvydas Ignotas from comment #6)
(In reply to Jactry Zeng from comment #5)
Paul also has a patch for improving the stub in https://gitlab.winehq.org/wine/wine/-/merge_requests/2463, if that one also works for a real-world application (e.g. Softube VST plugins), perhaps we can try to get that one upstream?
Yes it works, when I sent my patch I simply wasn't aware of his work.
I couldn't get 2463 to merge nicely, and i don't have a lot of time atm, so i tested 6006 and it builds and works perfectly. Softube vst3 plugins now seem to work properly in Bitwig.