I would ask the problem presenter if they agree that what the team is saying is actually the problem. I would then ask that the group focus during the next segment on asking questions related to that problem. I would give them a decent amount of time so that they don’t rush, and by asking questions I think they will uncover underlying issues.
Time for an intervention! If the team is going around in circles, the questions they have been asking aren’t getting answered to anyone’s satisfaction. I would ask the team what they think they are doing well and what needs improvement, and I would myself answer the latter (after they have had a chance) by saying I think they are asking the same questions over and over. I would note these questions and ask the group why they think no one has been able to answer these completely as yet, prompting them to think about these questions from a new perspective. Then I would ask them to see if they have agreement on the problem, and we would move on to the next segment.