I am facing the same problem recently reported on this forum (https://moodle.org/mod/forum/discuss.php?d=412316),
but with other type of question: a Formulas Question.
On Moodle 3.8, regrading is not working after updating the key of a faulty question. The grades are not updated.
I've followed the steps available in the Moodle docs and I’ve been searching and found posts such as the following:
https://moodle.org/mod/forum/discuss.php?d=400581
But they haven't
worked for me.
Thank you in advance for reading. I look forward to your feedback!
Viviane