I'm having the same issue but zoning doesn't correct it for me. I noticed it as recently as today when I was near the inn in Northern Ro. That gorgeous gypsy music started up so I stopped to listen... until the melody picked up and was super off-key.
[You must be logged in to view images. Log in or Register.] Kinda took me out of the moment.
It has also happened in West Freeport and the Ocean of Tears.