Hello,
To clone a single content such as a table, we recommend using the cloneWordContent method (https://www.phpdocx.com/api-documentation/docx-path/clone-elements-in-docx). And use the cloneBlock to clone more than one content.
Anyway, it should work correctly. Please send to contact[at]phpdocx.com the template and we'll do some quick tests.
Regards.