- Issue created by @maxwellkeeble
This has likely been introduced in this commit.
There are no code changes to course_quiz in that commit (just to a test), so I think this is something across multiple types of course object. However from a quick look I can't understand what other changes might have done this.
In the meantime if anyone needs the working dev, perform:
composer require drupal/course:dev-3.x#287a3bf