Easy forms export missing fields

Easy forms version: 2.12.09

Let's say I have a form with two fields and one of them is a radiogroup of checkbox. When the user doesn't select an option, the stored formdata will not have the property hst:formfielddata.
This means the form data could look like this:

• Tick_1

• hst:formfieldvalue
• hst:formfieldvalue

• Tick_2

• hst:formfieldvalue (no hst:formfielddata property)
• hst:formfieldvalue

When I try to export my data to a CSV file, the column that represents the hst:formfieldvalue with no hst:formfielddata property is missing. When I add the missing property in de console and export the data again, the column is also exported.