RE: XPS 13 9360 - first half-second of any sound is missing from USB-C/HDMI
Hello. Frustrating to get no response from Dell and no reply here. I suggest you send this Dell guy a private message and ask if he can check on the status of your ticket.
About the Laptop Audio board, I think it is just the nature of the board. People come here to post their own issue, not to look around and discuss other folks issues. And as far as the regulars, I am the only "full time" regular on the board, So basically, just not enough eyes here.
There is another fellow who has been dropping by to help recently, who has a similar model, an XPS 9365. You could contact him and ask about his experience with it.