It is likely content or configuration related - although what in particular is a different story.
My first thought would be, are there any students enrolled in this course? If not, why not create a new course, bring the content over and delete the original. As you have indicated the content works in another course. Personally, I wouldn't struggle with it causing hair loss and sleepless nights when you have a solution.
That said, if you have existing students or must use the course content in this technical "course container", I would start by looking at the database comparing a course that works, with this content, with the course that does not work. Perhaps there is html code that stops it from displaying that is not exported when copying to a new course. Similarly, perhaps from viewing the database tables, you could discovered configuration settings that are different?
Cache?
