https://bugs.winehq.org/show_bug.cgi?id=49815
--- Comment #14 from Kyle Devir kyle.devir@mykolab.com --- Ah...right. The proton-tkg builds revert all of chains of related commits that break esync.
So, this bug report may as well be worthless...
I'll have to go back and bisect WITHOUT the reverts.
What a massive oversight on my part... :|