https://bugs.winehq.org/show_bug.cgi?id=47297
--- Comment #8 from Shadders richard.shadbolt@btinternet.com --- Hi, I forgot to add - 25th May 2019 the distribution upgraded to v4.8 staging which failed, and all previous versions worked no issue.
I understand you want to remove any intermediate process such as PoL, but i do think this is sufficient evidence (including previous comment) of v4.8 staging having an issue.
Regards, Shadders.