https://bugs.winehq.org/show_bug.cgi?id=50779
--- Comment #14 from Rafał Mużyło galtgendo@o2.pl --- ...my current guess goes toward strmbase, but while that would explain why both quartz and winegstreamer are affected, this seems to be something about what it fails to do, as opposed to something it does...
That is it seems to be a case where for one reason or another a call to free/unlock something isn't being done. While there weren't that many commits, the code shifts were significant...
Also, that code feels quite convoluted to me. It might need to be, but it makes it difficult to follow and comprehend.
To make things more difficult, BaseOutputPinImpl_GetDeliveryBuffer is spamming the console after activating that debug channel.