We discovered this issue during beta testing of a new course yesterday and I'm baffled about how to fix it.
When revisiting a question slide that has been drawn from a bank, the Previous/Next buttons are sometimes replaced by a non-functioning Submit button. This essentially locks up the whole course because there is no way to continue.
It does not seem to happen if revisiting the question via the Review or Retake buttons, only when the slide is revisited using the Previous button from the Results slide (backwards), or if revisiting (forwards) from the main menu back through the quiz.
I haven't messed around with the revisit settings and they all seem to be set to "automatically decide".
I'd rather not post this course publicly, but I could send it or a portion of it privately to your support team if that seems necessary.
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