Have you tried building this using the freeform drag and drop question format? It would control this for you.
New Slide > FreeForm Question > Drag and Drop
Alternatively you could remove your Adjust alltaskscompletedvariable to True, and instead add the variable conditions to the Next button trigger.
Jump to Slide X when user clicks Next button IF - Then copy your list of Variables.
Your current variable is dependent on the learner dropping Button 1 on local examples. So this action will only be initiated when the learner drops button 1 on local examples.
I hope this is helpful!
Carrie Ann