The most baffling audio problem in my IT life that I can find nowhere else - A particular audio device is showing properly everywhere *except* Output

[Windows Server]

I am an IT guy. I work IT. I've fixed a lot of IT problems. I should know what I'm doing.I am fighting this demon and I am losing.Windows 11. JBL Quantum810. I have searched for driver updates, uninstalled the device through Device Manager, restarted a dozen times. I am currently listening to YouTube through my headphones. But the only way I got that to work was going into Windows 11's new Volume Mixer menu, opening up Firefox specifically, and then switching the output device to "Headset Earphone (JBL Quantum810 Wireless Chat).In Device Manager? No problems. Using Volume Mixer to play a test

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