Odd behaviour with Note Expression Editor and/or Expression Maps

Some tracks in my template, if I draw in CC data in the Note Expression editor, the audio feedback that I get is a completely different articulation than the one selected.

It can be seen in this video that the audio feedback that I am getting while drawing in the CC data is on a different MIDI channel to the one that the current articulation is on.
Even if I change the MIDI channel number in the Expression Map of that patch, it still plays that patch instead of the correct patch when drawing in CC data. Which tells me it’s not the Expression Map.