I found the cause of usbguard becoming unresponsive and filed https://bugs.launchpad.net/usbguard/+bug/1855189 (with https://github.com/USBGuard/usbguard/issues/349).
I found the cause of usbguard becoming unresponsive and filed https:/ /bugs.launchpad .net/usbguard/ +bug/1855189 (with https:/ /github. com/USBGuard/ usbguard/ issues/ 349).