I have a midi file that opens and plays fine in RB. However, when opening in BIAB, most of the Midi drums notes are missing. A few things I've tried are:

- From RB, saving the song in both Midi 0 and Midi 1 format
- From RB, saving the part as a scrap
- From RB, copying the part using piano roll editor and then pasting into BIAB

All of the above gives the same results - the drums are mostly missing. The event list in RB shows the notes, in BIAB - just a few. Nothing fancy in the event list - just VolCtrl and Notes events.

Any clue as to what is happening and how to fix it?