issue: IDP is unable to extract data from the grid in the pdf form

I encountered an issue: 

IDP is unable to extract data from the grid in the pdf form during the Reconciliation task.

We are using Google AutoML and the template is static.

My form is of 4 pages with multiple Grids/Tables apart from the text fields.

It is able to extract the data from the text fields correctly, however,

it is unable to extract the data for the tables and the check boxes.

Can you please suggest any work around or help me understand what is the correct way to implement it?

Thanks.