https://bugs.winehq.org/show_bug.cgi?id=42009
--- Comment #7 from winetest@luukku.com --- This was useful feature that I wasnt aware of http://source.winehq.org/git/wine.git/tags
You can pick any wine version since you said it was working 1.9.19 I picked wine 1.9.20
http://source.winehq.org/git/wine.git/blobdiff/b488a67bafbfe231579bfd2a47f45...
To me bug 41273 looks promising.
Are you able to compile wine yourself? Reverting that commit could fix this bug. Could be some other change, but that looks promising since it's clipboard related fix.