https://bugs.winehq.org/show_bug.cgi?id=30557
--- Comment #114 from Bjoern Bidar theodorstormgrade@googlemail.com --- (In reply to Andrew Eikum from comment #112)
Created attachment 52985 [details] Always run gstreamer callbacks on a Wine thread
Here's an implementation of the command stream approach. It seems to fix Echoes and GTA:VC for me.
What about supplying your patch to wine-staging?