Issue with navigation in Rise course

I’ve built a Rise course that includes different learning tracks for multiple languages.

At the start of the course, learners choose their language using a button stack, which directs them to the four chapters belonging to their specific track.

Because of this setup, I’ve turned navigation off so learners only see the chapters relevant to their track rather than all the other language versions. However, I’m now encountering an issue: if a learner goes back to a previous chapter within their track, they’re unable to move forward again. They receive the error message: “Chapters must be completed in order.”

Has anyone seen this before or knows what might be causing it — and more importantly, how to fix it?