Create a course hereinafter referred to as the "source course" Create a quiz activity inside the source course Create a true/false question inside the quiz (note that the question category is under the course context by default) Create another course hereinafter referred to as the "destination course" Import the source course into the destination course Edit the question via the "Questions"-tab within the quiz in the destination course. eg. append "edited from within quiz in destination course, first import" View the question in the "Questions"-tab within the quiz in the source course and observe that the question did not change. This is expected! Import the source course into the destination course again Edit the question via the "Questions"-tab (not the "Question bank"-tab) within the newly imported quiz in the destination course. eg. append "edited from within quiz in destination course, second import " View the question in the "Questions"-tab within the quiz in the source course and observe that the question has changed according to the edit in the destination course. This is unexpected! I also verified the unexpected linking with the following code line inserted to question/bank/editquestion/questions.php: debugging( "Question category details on question id $id... id: $category->id, contextid: $category->contextid, parent: $category->parent, name: $category->name, info: $category->info" , DEBUG_ALL);