"Resume Saved State" - no longer works if Next button disabled when timeline begins?

From the tutorial: "Resume saved state: Use this option if you want the slide to always remember its previous state. In other words, this option lets learners pick up where they left off when they leave the slide and come back to it later."

I have routinely built slides where the Next button is disabled when timeline starts, and normal when timeline ends. When revisiting the slide, I set it to 'resume saved state.' With the recent updates, it appears this no longer works; when you revisit a slide, the Next button is disabled. What am I missing?