https://bugs.winehq.org/show_bug.cgi?id=56824
--- Comment #4 from Fabian Maurer dark.shadow4@web.de --- Created attachment 76634 --> https://bugs.winehq.org/attachment.cgi?id=76634 Patch that should fix the issue
I kinda misread this as "Portal 2", so I can't actually test. Although I think I found the underlying issue.
Can you please test the attached patch? This should fix the issue.