If you render the song to a WAV file, and then make any change to the BiaB song and then play it, the original WAV file you created will play along with the new/changed song.

Could this be what is happening?


BIAB & RB2026 Win.(Audiophile), Windows 10 Pro & Windows 11, Cakewalk Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Session Keys Grand S & Electric R, Kontakt, Focusrite 18i20, KetronSD2, NS40M, Pioneer Active Monitors.