I found out two interesting things about the Motive drop/Opportunity music looping bug:

- The bug stops if you get off the lot where the bug started and back to the main map
- It also stops if you die and have a death flower

In both cases the bug doesn't happen again if you try to complete the same opportunity, but it also doesn't allow the opportunity to complete either. The bug resurfaces if you drop the opportunity and try to turn in another. This was all on a fresh game, AM only. Random CTDs that did occur were completely unrelated to anything with this bug.