Content locked

Good evening everyone.   I am having an issue where content is playing however the slide shows locked in the menu and you are unable to expand it to see the associated slides.   I have been using a work around of relabeling the slides in the menu which seems to fix the issue.  Just curious if anyone else has had a similar issue and what other work arounds others may have found.   If it helps it isn't the entire project and the menu is not out of order in the player...it is just remaining locked and not expanding on certain sections TIA