(Windows 10/Server 2019 i7/Xeon Desktop/Laptop, Ubuntu i7 Desktop/Laptop, Chromebook)
(Windows 10, Windows Server 2019, Ubuntu Linux, ChromeOS)
WHAT I TRIED TO FIX THIS:
So, I invested quite a lot in multi-room audio, networking, etc, I'm an experienced network administrator and DevOps (15+ years), and I still can't find the cause for this extremely annoying issue. I know Google Play Music works fine, I know Spotify Android casting works fine, but not from the desktops/laptops/servers. I don't want to use my phone. There's not a single issue in my environment, from the first power source (which are all stabilized, btw) to the latest CPU.
What else is there to do to fix my problem?