This is just a tip, nothing to do with them memory issue above:

Looking at your chord progression, a good tip would be to use simpler chords, like simple 7ths chords in bars 9 to 12. The result will be a much better sounding and more varied arrangement.

Because BIAB is designed to think like a real musician. If BIAB (or jazz musician) sees a Bm7 BIAB is free to embellish it, but if you put a very specific chord, BIAB assumes you want that one, and so it doesn't embellish it.

Instead of

Bm11 E9 A9
Just put
Bm7 E7 A7

For maximum variability, in jazz stick to the 7th chords,
Cmaj7, C7, Cm7, Cm7b5, C7sus, Cdim7, C, Cm

Of course if you need a more specific chord, go for it and put it there. This is just a tip for variability in what's played. For example, you might sometimes hear a flat 9 on the E7 chord, but you won't if you put E9


Have Fun!
Peter Gannon
PG Music Inc.