Did you? Where? I didn’t so far.
Is there any error in your logs related to questions? This column in quizzes table is incremented every time a new question is added, so if any issue/error happened there, it may have stopped the script before it updates the number of questions on the table.
Anyway, as this isn’t crashing the board, it can wait until I have to update the app again. Or I can provide a query to update the table if it’s really that annoying or urgent for you. You’d have to use PHPMyAdmin in your hosting control panel.