HELP - Markers Not Working In Preview Mode

I am having trouble using the Markers in Storyline. I have used this engage feature previously in modules and had no issue. However, now, when I enter content in the description part, it does not show when I preview. 

Has anyone else had this issue? Any workaround?

I have already deleted and re-added and had the same problem each time. 

I have attached screen shots to this post.

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