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bbfa235
(Get the code!)
I have a similar issue with my Logitech Brio. Used with Google Meet I can usually get through one meeting after which the webcam hangs and the camera light stays on, even through a reboot. A combination of unplugging, rebooting and replugging seems to be necessary to recover it.
The webcam has the newest firmware (2.4).
I have it connected to an ASMedia controller as well.
0a:00.0 USB controller: ASMedia Technology Inc. ASM1042A USB 3.0 Host Controller (prog-if 30 [XHCI])
Moving it to a different port on the same controller does not fix it, so presumably the controller crashes. Moving it to a different controller seems to work.
00:14.0 USB controller: Intel Corporation 9 Series Chipset Family USB xHCI Controller (prog-if 30 [XHCI])
Note that this is a fairly recent issue for me. I have not always had the issue. I suspect the upgrade from Ubuntu 18.04 to 20.04 or a recent kernel update is where this issue started appearing.