Nuendo not receiving MIDI when in background

A very odd one, again. When Nuendo is in the background (i.e. not the currently forward app) it seems not to accept midi controller input reliably via generic remote. Even with an app like TextEdit in the foreground, Nuendo stops responding to controllers.

Any thoughts?

M

This problem, like others, solved by going back to 5.5. Again. Sigh.

M