If I had any hair left, I would be pulling it all out right about now. Reaching out in the small chance that someone has this very particular problem.
I am using a Sub 37 as a midi keyboard directly into the midi in of the Octa.
midi channel 1 on the octa is set to send back to the sub as a sound module.
send and receive midi channels are not conflicting.
Octa receives on Auto channel 2
Sub sends on channel 2
sub receives on midi channel 1
All 8 midi tracks are set up like this with the obvious exception of midi out channels sending to different sound modules.
This is all working as expected without issue…with the exception of some bizarre problem between the sub and the octa on note F#2
The sub will not send this note or the octa will not recognise this note - and it only occurs with the sub 37
All other midi tracks/sound modules are fine.
This issue is not only present via midi keyboard input, but when setting that note on the octa itself,
including chromatic mode.
It is only this note and only between these 2 devices.
When I turn local on to test the sub, it plays that note just fine.