When I click on one of my courses, the course pops up and I am able to scroll down to about the 25th lesson, but after the page doesn’t load any more of the lessons for that course.
If I go into edit the course, the lesson does show that it’s there.
I have experienced the same issue. However when I click on ‘view all’ (under ‘continue studying’), and then open a course, then I can see all lectures.