Multimap + aftertouch

I’m using the A4 controlled by a AKAI mpk49, I managed to get the multimap function working quite easily. But it seems to cancel the aftertouch function when activated.

If I use the controller with midi channels 1-4 (the default midi channels for tracks 1-4), the aftertouch and the modulation wheel work just fine. But to be able to use the multimap I need to use it via the performance channel and when I do this the A4 only receive notes.

Is there any way around this?

Hello
I have the same problem. Have you found a solution yet?