In single quiz Questions tab, many actions open AJAX modals.
Sadly drupal can't load javascript in AJAX modals (nor dialog) forms.
Enable quiz and multichoice. Multichoice uses a simple js wich auto-set "Score if chosen" to 1 or 0 changing the state of the "Correct" checkbox.
Add a multichoice question from the Questions page (without AJAX modal) to see the helper script working correctly.
Create a quiz and add a new question: the js won't work, as it's not even loaded.
Editing questions has the same behaviour.
Remove the modal options and use destinations instead.
Active
7.0
Code - Quiz core
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Fix should be in an MR and most likely will need test coverage
I'm not able to reproduce this issue are there more clear steps you could provide maybe?