Hi,
I'm writing from a i9-9900k, Z370-HD3P, GTX1050Ti Zotac.
I have the exact same problem.
My audio works only when I hot plug a second monitor....
Is there some script that could help?
I have AppleALC, Lilu, WhatEverGreen and clover updated....
The same configuration with a gtx1080 works great :'(