> LOL. This really is very odd. I'm open to any thoughts you have.
Thanks!

Indeed - it might come down to the actual USB devices/Hubs in play and
their exact type and firmware.
OTOH that might also explain why not everyone ever using it complains
about it being dysfunctional but a few do.

> Could that be part of the fun here?

Not uncommon - a single USB device can define multiple "Interfaces" to
support different things at once.
With lsusb -vvv -d <id you got for that dev> you can see what it is -
it can be e.g. a keyboard also registering a mouse for a trackpoint or
such.

P.S. I'm not an USB expert - I know there are even malicious devices
that e.g. have an USB stick also provide Keyboard/Mouse to hijack a
computer. I'd not expect this to be the case here, but you never know
so I wanted to mention.

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https://bugs.launchpad.net/bugs/1906155

Title:
  USB Passthrough Fails on Start, Needs domain Reset

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