I can replicate this issue on my system.

- created a track in Cmaj, 4 bars, C only, 3 choruses
- selected a style with 5 instruments _CTRTSEC
- generated, played - all ok
- selected Piano track, changed RT to Best Sub (1855, also 2428) - regenerated and played ok
- for the newly updated track, changed AutoFix Sour Notes to 'Song Chords' - BIAB crashed (not responding)

I noted that the track not responding each time has been the Drums....


BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.