For Comparison, I put 32bit Bullseye on the card, updated, then did a full install of BAP
Everything installed on the first attempt, including FLDIGI
So there is something a little different with the way things are done with 32bit and 64bit Bullseye
One thing that I know is different is the update that shows up in 64bit after the first BAP install attempt. No matter what I did with 64 bit, I could not get it to show the update icon before the first BAP install attempt.
Thinking out loud, I am wondering if BAP gets installation of 32bit items, and then the update wants to update to 64bit for those things. I might be wrong (as I am often wrong :D ).