• Version: 41.70
• Singleplayer/Multiplayer: Singleplayer (but I assume this also happens in multiplayer)
• Mods: Nope
• Old or new save: New save
• Reproduction steps:
1. Start new game.
2. Wait for music/OST.
3. Open the Map (Press M).
4. Music stops and won't play after you close the map