Nuendo Midi Remote not working with AKAI device

After the recent Nuendo 12.0.52 hotfix, my Evolution U-Control midi controller is working again fine. But not so my AKAI MPD24 midi pad control. And I can’t figure why. It is recognised and works fine when (for example) assigning Midi CCs to VST instruments within Nuendo. But the new Midi Remote panel doesn’t let me set it up successfully. I select the correct input and output ports, but then it doesn’t react when I touch the controls of the AKAI. When I close the dialogue I get the message: 'The MIDI controller Surface did not contain any elements and was therefore not stored.

I have made sure that Track Quick Controls and VST Quick Controls are NOT CONNECTED in the Remote Devices (Legacy) panel.

I thought that new Midi Remote is capable of setting up any generic midi controller. Is this not the case?

Any help on this would be greatly appreciated. Thank you.

I am on a Mac running BigSur