… This happened when using the app or on the pedal. I’ll tell you when assigning on the app. I add the basic loop to my pedal. I have the clock responding to midi to sync with my other pedals. When I assign the button (a or b depending on which side I added the effect) to trigger the 1-step function so I can start/stop/erase with one pedal using the Morningstar for midi. I’ve tried both the assigning of the cc number and the midi learn. From there it seems to work for maybe one loop then it gets reset to act/byp for that button. What am I doing wrong and let me if you have any other questions.

I was working on something similar this past weekend.  I couldn’t reproduce the issue, either.

Any chance you can hook up the Morningstar to a MIDI Monitor?  From an outsider’s POV, it seems to me like the Morningstar might be transmitting some additional MIDI messages?

Just a guess, but I’d check the Global MIDI or other Program assignments in the H90, especially the various Act/Byp & HS parameters.  I’ve gotten nailed (inadvertently, more than once) by LEARN with an intermittent CC#0 Bank Change from an S/A Reflex, or upstream synth.