Possible Midi Conflict

I have a Faderport V2 and an Akai MPD218 both are connected via USB midi.
All show up as expected in midi port setup.
The Faderport works A1 if the MPD is not connected. As soon as the MPD is connected the Faderport looses contact with Cubase and the MPD218 is then working A1. All midi ports still show in devices. It is not possible to reset the Faderport at this point and only restarting with MPD disconnected works.

This is a new issue to me, these pieces of equipment have previously worked together, not sure what happened.
Any ideas please.

Resolved. Looks like it was a Windows issue. After a Windows cold boot all resolved.