Thanks again for your patience with us while we figure this out, and for checking both versions of the build just in case! :O
After testing it a few different ways as a team, we believe the issue should finally be resolved.
In short, it was stalling out as it was trying to grab variables that were non-existent at that point in the dialogue as a result of a faulty loading process from the Main Menu. The Scene Selection has been updated to be a bit more clear, and now when you load into a chapter from it, it should progress properly!