This is true I have a client/friend who has been trying to use some Line6 audio gear with a windows 10 machine. Stupid thing is constantly freezing audio sound system for no seeming reason. After a few weeks he gave up and plugged it all into his mac. lol
I agree though ya this sound issue is odd. Sounds like his card is perfectly supported by the kernel... its some strange interaction with something he is running.
We have a Windows 10 PC here that 'constantly' looses the Mic, even rebooting the machine doesn't rectify the issue. The only way to resolve it is to physically unplug and replug the mic, go through the process for Realtek sound to recognize it again and then it works...
It's done it for as long as we've had this PC from brand new, nothing I do rectifies it.