"Next lesson in course" doesn't seem to work

I see there is a “Next lesson in course” link now, at the end of each lesson belonging to a course, but it doesn’t seem to work. I clicked it in a lesson from the course “Les Misérables” I have created in the French library, but the lesson that opened was not the following one.

@ mikebond - There was a problem briefly with this link but it has now been fixed.

Thanks, Mark.