If you didn't get a correction note or any other note that could explain why your quiz is offline, yes, I think you should resubmit it. However, it might be wise to add a note to your quiz (by sending a correction note to your own quiz) explaining that you didn't take it offline and that you didn't change anything. Otherwise the editor that gets to your quiz will probably wonder what happened.
I have no idea why the quiz is marked as new all of a sudden. Do you know when it happened? Maybe it has something to do with the weekly update of the quiz rankings.
The cost of living has not affected its popularity - Loesje