I just created a specific form for 1 of our services and while testing I just realize that I can't de-select the radio buttons.
Once you click them, you cannot deselect them anymore.
Radio buttons are de-selected when their respective field's values no longer match up with the value the radio button is configured for.
In your example image above, only one radio button should be selected for the question given.
If you can select more than one of those options, you'll either need to use checkboxes, or three sets of two radio buttons for 'Yes' and 'No' to each item.