For what it's worth, I have a different board, but the same USB lockup issue and symptoms.
These lockups have happened multiple times on video calls and I can watch the video and continue to hear the calls go on, just can't interact with the Hack at all. Pushing the power button during that state brings up the expected dialog box, but I don't have a way to click anything... I'm using an Apple Magic Keyboard and Mouse and am assuming I lose connectivity because I lose the USB header on the Broadcom AirPort card.
Just for giggles I pulled my GC-Titan Ridge card and went a week without lockups. I reinstalled the GC-Titan Ridge card Sunday had a lockup in less than 24 hours.
Now what I found really interesting is the only USB device I had plugged in (before, during, and after the test) was a Logitech Brio webcam plugged into HS05, which along with the Bluetooth, should have been on the onboard USB controller, not the GC-Titan Ridge card.
I don't have an answer, and am not sure what to test next
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