Ive been trying to do this recently as well and my set-up is similar to yours.

Ive got it working from other hardware but not Ableton but thought Id mention it.

I have channel one midi set to channel 14 and then auto channel set to channel 14.

Everything other channel is set to off including performance and effects channels.

Using the lowest midi motes will then trigger each channel separately.

It doesn’t feel logical to me that it should work this way but in my case it does so maybe worth a try.