I don't have a current solution to your issue, however, I do know that the PG Music developers are very recently aware of further issues with Music XML, and that these are apparently being worked on now to resolve this. A patch is expected. When? I don't know.

Please see the threads in this post:
https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=803583#Post803583


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.