Test without success:
Disconnect UR23, remove usb driver and reconnect
sudo rmmod snd_usb_audio
Upgrade from Moode 9.0 to 9.1.2
Update usb.ids list
Add a conf in modprobe.d/8812au.conf with
options snd_usb_audio index=2
and add a file ur23.conf with
options snd_usb_audio vid=0x262a pid=0x10e7 device_setup=1
Few reboots
Disconnect UR23, remove usb driver and reconnect
sudo rmmod snd_usb_audio
Upgrade from Moode 9.0 to 9.1.2
Update usb.ids list
Add a conf in modprobe.d/8812au.conf with
options snd_usb_audio index=2
and add a file ur23.conf with
options snd_usb_audio vid=0x262a pid=0x10e7 device_setup=1
Few reboots