What style(s) and soloist are you using? I did a test run to test your issue. I used Medium Pop Ballad, filesname "*_MDBALC" . I tried C major for two bars, F major for two bars, then Cm two bars and Fm two bars. Used Guitar, Electric, Soloist PopModernGrooveGritty Ev16 075. BIAB made the changes to minor progression fine three choruses through.

What if you found a soloist that doesn't do minor scales?

Atze