The Deep Dark does not play its biome-exclusive music

The ambient song, Ancestry, does not appear to ever play whilst in any form of the deep dark biome/ancient city.

Steps to reproduce:
*Locate an Ancient City or Deep Dark biome
*Wait for the ambient music

Expected results:
The song “Ancestry” should be playing whilst in this biome/structure

Actual results:
The song does not ever seem to play, and instead, the normal ambient music plays.