I am having a strange problem with a particular course. The course has numerous activities that were all built in Articulate Storyline. At the end of each course activity is a button that when clicked, should advance you to the next activity. The button is programmed with the URL of the next course activity. Completion tracking is set to “on” for each activity in the Moodle course so a person can’t go to the next activity until they have completed the one prior.
Here’s what is happening. For a number of people (but not everyone) when they get to the end of the course activity and click on the button to advance it tells them the next course activity is Hidden, (indicating Moodle doesn’t acknowledge the current activity completion). They should be able to go on to the next activity because the current one has been completed. It then bumps them back to the main course page where they have to go through that activity again. If they go through it again, they are able to click the button at the end and advance to the next course activity on the second time through. It seems that completion tracking is not working the first time through. This is especially strange because it is not happening to everyone that is going through the course.
Any idea what might be causing that?