Tested this finally today, unfortunately it doesn’t seem to work, there is no communication at all.
You might need to power on the metamodule first, then connect the rotocontrol.
The remapped controls will show up on midi 1
No, that doesn’t make a difference. I know the setup is working, when I change the FW back to latest, it works fine. 
edit:
I wonder if it’s anything to do with the MRCC 
although I am not changing anything on that either.