slide jumping to next for unknown reason


Since the recent update Question #5 is jumping to the next slide about 1 second after the lightboxed instructions are closed. I can't find what is causing this and it has worked fine up until now. 

Note: All questions are made to be skipped if they have previously been answered correctly. On this slide Variable5 is controlling this.

Here is the Review Link to see it happen:

The source is attached below. 

Can anyone see what might be causing this? 


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