https://bugs.winehq.org/show_bug.cgi?id=52322
--- Comment #12 from Bernhard Übelacker bernhardu@mailbox.org --- This bug should now be completely fixed with: https://gitlab.winehq.org/wine/wine/-/commit/07c0cd6ba5f4b1d6ef738ad7f3cad99... (I cannot change this bug's state.)
In the MR is another application "trackmania leaking memory on proton" mentioned - this seems discussed here: https://github.com/ValveSoftware/Proton/issues/6507#issuecomment-1493299894 I found no separate wine bug, but it might be fixed by this commit too.