Redirect will not erase students responses. Students will still see their original responses.
The small squares gets uncolored to show the live response of the redirected attempt.
It is our suggestion that if you are redirecting because student ran out of time, you should note which questions were missed, and only have students answer those questions. Redirecting does allow them to change an answer for any of the questions.
Student missed a question.
Assessment gets redirected.
Answers are not lost.