A form created with multiple questions using different datatypes i.e. TextBox, DropDown, Checkbox, Radio Button, etc. Answers that was typed into a textbox datatype field does not display on the summary page.
This is working as design. Only fields with a predefined answers or selections (i.e. Radio buttons, Dropdown selection, etc) will display on the summary page. If a field requires you to manually type your response (text field), your response will not be displayed on the summary page.