Wish I could help you Michael, God knows I have tried to figure this all out since I use a lot of midi. In the past I have opted to take the midi out of BIAB as quickly as possible and figure it all out in my DAW, which has worked well for me. But I would like to do more in BIAB with Midi. However, my conclusion at this time is that this is a bad time to try to figure out the midi routing and patch assignments in BIAB due to the recent update. I have just seen the strangest stuff, similar to what you are reporting here. All I can offer is, keep reporting and things will get fixed or someone will come along who knows a lot more about this then you and I.

Dan

BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6