I have an instructor reporting that differentiated assignments / dates does not work for practice quizzes and ungraded surveys. I've briefly verified the behavior. (Create an ungraded survey, make it available with a due date to the whole class, then give a single student an extended due date. The survey is saved, but upon refreshing, the extended due date is lost.)
I'm not seeing anything in the Guides or elsewhere in the community about this. Is this something others have experienced? Is it intended?