As it turns out, this is addressed in the class specification. I wonder if it’s the spec that’s deficient or whether the devices in question are non compliant.

As it turns out, this is addressed in the class specification. I wonder if it’s the spec that’s deficient or whether the devices in question are non compliant. See page 40: https://www.usb.org/sites/default/files/CabConn20.pdf https://www.usb.org/sites/default/files/CabConn20.pdf