Was it purchased recently? They ship with the latest firmware already installed. Last firmware change was June '16.
What happens and what do you have to do to get it connected again? Do you think it is just a particular controller? Or how long it has be connected?
I have seen on the 2600-daptors sometimes the USB connection is reset when the controller is changed (particularly with the 2600 keypad), but it reconnects itself. The situation is different on the Vision-daptor, as you need to unplug/replug the USB when changing controllers.
OK, I will have to update the firmware then, because I purchased it in Feb. or March of last year.
It seems to happen after about a minute or so. I have a few other controllers to tryout. I'll try to test them at some point tonight.