Does it happen on one particular song, or all songs, and if you regenerate, is the behavior consistent at the same bars?

Is it a MIDI track (yellow) or a Real Track with transcription (identified because of the underscore)?

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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.