Thanks Bob. Yes I do understand that. I create and revise all my backing tracks on my Windows version of BIAB and transfer them to my iPad. I like using the iPad version for performances because it fits unobtrusively on my music stand next to my iPad Pro which shows my sheet music. (I also like having a working highlighter as I tend to get lost from time to time.)
I'm not tech savvy enough to know about the other programs you mentioned. If BIAB for iPad doesn't get fixed I guess I'll have to look into them. I like to keep it simple so I hope that I can continue to just use BIAB.
Cheers! -Alastair