Button state change is not showing all my slides as an option

I'm trying to add a state change on a button to activate on a particular slide, but Storyline 2 is not giving me all my slides as an option, as with Storyline 1. Did this change across versions?

I am on a menu slide with several buttons (slide 1.4), and I want to add a state change of visited to Button 1 when the timeline starts on Slide 1.12, but Storyline is not giving me all my slides as an option. (see attached pic)

 

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