Do you possibly have any Audio recording that you exported at any stage. Try disabling Audio, make sure that tracks are NOT frozen, and be sure to Regenerate the song (don't just press Play).

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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