Yes, I can not confirm the helix is sending pc messages to other devices at the moment because hilariously enough these are my only two pedals I currently own haha. I’ll have to figure out a way to test that when I get back from my trip.

They for sure are in same midi channels. Iv even tried different ones in different presets.

I remember specifically when it happend. It was as if saving an algorithm I was messing with (Lowered verb several times and used save to h9 on app) stunted the h9. This was at a gig and was pretty annoying since I use the h9 for most of my verb/delay sounds.