https://bugs.winehq.org/show_bug.cgi?id=56935
--- Comment #6 from Grazvydas Ignotas notasas@gmail.com --- (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.