Explanation: The original CD version never had this problem. This was because when you get to a movie the music stops (red book audio, to be exact) so the actual movie could run. That is how CD-ROM drives back then, they can't stream two things at once. Because of this the original developers did not code in something that does make the music stop while movies are playing. The CD-ROM drives already did their work for them. However, as a side effect, digital releases with WAV\MP3 music instead of CD audio music suffers, since music plays during cutscenes, thanks to hard drives and RAM letting you do more than one thing at once.

The only way to fix this problem is by buying the CD version.