Json null shows as ""

Not sure if this is something I’m doing wrong on my part but I have this structure (only showed relevant part to avoid confusion), this is a upload form.

My issue is the double quotes even when my summer note lite text area is completely empty I ideally need this to be null as when I then try add a default value on my front end when this field is null doesn’t count the value as null meaning the default data is not shown and is left blank.

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