I will look at the matter, but I do not know that there is a question of privilege here.
It is a long-standing practice in the House that although questions may be directed to certain individuals, others sometimes respond. We see that daily in question period. Sometimes the Prime Minister answers. Sometimes we hear the Minister of Transport, Infrastructure and Communities answer. There are even times the government House leader answers questions that are directed to the Prime Minister. It is just a matter of which item someone is ready to answer and that the person is prepared to give answers and has understood the question and so on, which we have happen in the House on a regular basis.
I do not think that it is a matter the Chair can make a decision on, given the long-standing practice in the House