I agree - it’s not passing Auto Channel MIDI via DIN or USB
it’s now a useful facility given the device can sequence, but can you be confident it once worked or have I(we) assumed it would work
but yeah - a bit surprised that it doesn’t offer all the functionality of the onboard keys - it may be unexpected behaviour and a bug, maybe report it then
I tried by setting the output channel to both options too, but it made no difference
It will play the onboard synth fine but won’t share the incoming MIDI forward, as though there was only activity on the mini-keys !
using discrete channels externally doesn’t make a difference either fwiw