I have tried with several MIDI controllers (Steinberg CMC, Behringer, Korg, M-Audio) and it seems that the Shorcuts’ MIDI trigger part is broken. I can put in the MIDI command with MIDI learn (so there is communication) but afterwards the MIDI command does not triggering the event. The Key switch commands in the same section from the computer’s keyboard are working though.
Do you find the same bug when trying to use MIDI to control plug-ins? I have not been able to get this working, despite continued efforts. The issues I’m having are similar to yours…