DOCM, DOTM, DOTX and XLSM provide wrong output on post functions

When we have a template in docm, dotm, dotx format, and select docx as output, the report should have the same extension as the template. However, the generated report is always generated in docx format.

The same applies to the xlsm case. The generated report should have xlsm extension, but is always generated in xlsx

 
Note 1: Check Output Matrix.

Note 2: This only happens when exporting via a post function.