I've tried and haven't so far been able to reproduce this error.

Is it possible to provide exact step-by-step points? e.g.

1: In StylePicker, Press Clear then Select Style xxx and load song from the style
2: Generate & Play
3: Press Stop
4: Right-click drums and change RealDrums to xxx
5: Press regenerate
6: etc


BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones