I have been changing the soundtrack, trying to make a custom one from various artists, for personal use, etc. Had already edited descr_sounds_music_types, descr_sounds and descr_sounds_music, as well as the 'music' folder in data/sounds. Everything worked fine, except for the music for the winter season on the stratmap; it just plays the summer music instead...
Anybody knows what could be causing the issue? I already checked the files already mentioned multiple times.