When exporting Test Description field with a Heading from a Test Plan, it doesn't work properly in Word

Description
When exporting a Test Plan that contains a Test with a Heading in its Description, the template gets badly formatted on the TOC and also on the body.

How to reproduce

1. Create a new Test issue and put a Heading on the Description as the following example.
   
2. Add the Test to a Test Plan and execute it in a new Test Execution
   
3. Export the Xray Test Plan Report template on the Test Plan.

Actual result/Attachments
Opening the template exported file, you can check the TOC and also body of the template badly formatted.

Expected result
It should export the Heading without badly formatting the template.