This comes up repeatedly.
You can run a script like this in dom0:
#!/bin/sh
qvm-shutdown sys-usb
qvm-prefs sys-usb template fedora-43-xfce
qvm-start sys-usb
sleep 3m
qvm-shutdown sys-usb
qvm-prefs sys-usb template fedora-42-xfce
qvm-start sys-usb
That gives you 3 minutes in which to check that the sys-usb is working
properly under 43-xfce, after which the template will be reset. If you
are happy you can comment out lines 4-7 and run the script again.
I never presume to speak for the Qubes team.
When I comment in the Forum I speak for myself.