Grouped responses on form

Hi, I have been using forms whilst remote teaching. Previously when a form was set up, all answers of the same would be grouped together and make marking really easily. Now though, when I go to responses, I can see the normal 'people' or 'questions' options at the top as I previously did, but when I go to questions to see all answers to a particular question, pupils answers aren't groups as they were. Obviously needing to go through each one by one to give feedback. 

Is there a setting I have missed, or a change in formatting? 

Thanks.