[Windows] Kuldahar theme should be playing when entering Kuldahar

The_New_Romance

I've entered Kuldahar for the first time in my game now. From the old IWD versions, I remember the Kuldahar theme playing at that point. This doesn't happen in my game, there's some other sort of theme, which I think belongs to another map.

Reproduction:
1. Load attached save.
2. Listen to music. (Kuldahar theme for comparison: https://www.youtube.com/watch?v=9y96Y2JE5F8)

Observed:
Kuldahar theme is replaced by another theme.

Expected:
Kuldahar theme (see above) should be playing.

Notes:
GOG version, 1.4, on Win7.

The_New_Romance

Addendum: After resting at the inn, the theme plays. When leaving Kuldahar and returning, the theme doesn't play. Resting at the inn in that case lets it start again.