Every Yacapaca quiz draws questions in random order from an underlying question bank. It may draw all the questions available, or only a subset. Until now that decision was made by the author, but from today it is made at the point of assigning.
Here is where to find the control:
By default, 10 questions will be shown unless there are fewer than that in the question bank. If you override that default, your new value will be remembered as your personal default.
If you are setting a multi-quiz assignment, the most questions you can show per quiz is the maximum of the shortest question bank used. This way all quizzes assigned in one go will always be the same size, improving predictability for students. In the unlikely event this is a problem, remove the shortest quiz from the assignment and assign it separately.