I have a USB-midi interface plugged in and it all works just fine. I notice that in settings there is an option to add another device but having tried a few hubs, powered and passive and a few different devices nothing will give me two gadgets.
I came here as I have the same problem. I have tried different hubs and trying to get a launch control xl and arturia minilab on usb host but it only shows one at a time. So sorry no answer from me but following for any answers, thank you!
I was going to go to Thailand for a few weeks but I’ve got to figure out how to set up two devices in a usb host, so that’s out for another year. You going anywhere warm?