"Continue button" appears for some users and Gray down arrow for others

Thanks for including those screenshots, Abbie! Continue buttons in Rise will disappear after they have been clicked for the first time. The screenshot without the continue button shows that the learner partially viewed the next lesson, then went back to revisit the previous lesson.

I see you also opened a support case, and my teammate Phil shared some more details about this behavior. Please let me know if you have any questions about that!