Amazon Textract not reading click Checkbox field

I am trying to read the attached pdf file using textract but it is not reading the checkboxes as key value pair fields. It is only reading them as rawdata. For example, I am interested in the value of the question 10a on page #3. I am expecting the key to be " 10a. Per: (Choose only one)*" and the value to be the checkbox click value. But it is reading this only as raw text and I can not find if 10a is clicked or unclicked.

Did any one encounter this issue before? Can you please let me know

I have attached AWS textract image screenshots and PDF link

The pdf file