I've turned the music off and sfx to very low, but anytime a new music starts it seems to reset to full volume despite the position of the slider. Opening the settings and moving the slider around again seems to turn it off again, but it has to be done basically at the start of any new mission or any changes mid-mission. It's very annoying and I'm not interested in creating an account for the bug report site, so hopefully someone sees it here and cares.

FWIW I have updated to 1.05, not sure if it exists in previous versions.

edit- fixed in recent update, thank you.