An instructor asked me this question, and I have no clue why this is happening.
A student submitted an online quiz, and she sees the grades. But the instructor cannot see the submission. As far as the instructor and I can see, there is no submission of this quiz. For her, the clock of the exam is still ticking (it's not a timed exam). But on the student's screen, her quiz was submitted, and she got a score.
Her logs show up normal compared to those whose submission was received. So I'm not sure what is happening. Does anyone have any insights?