Description:
When exporting to a Microsoft Word document, there is an extra format character inserted at the beginning of a heading. Depending on how you view the document, it is a heading or a number.

Steps to Reproduce:
1. Open Libreoffice Writer and write some text. Press Control+1 to make it a heading level 1.
2. Save two coppies of the document, one as DOCX and the other as ODT.
3. If you open both documents in LibreOffice Writer and select preview in web browser, there is a 1. at the beginning of each heading you insert which shouldn't be there in the word dOCX. This is not visible when previewing the ODT.
4. If you open the docx in word, there is a bullet that is interpreted before the line. You cannot see this visually. I noticed it because I use a screen reader. Even though the bullet is invisible, the screen reader reads the bullet semantics  from the document for some reason. You can notice it visually by moving the cursor to the left of the first physical character in the line. This only works in Microsoft Word.

Actual Results:
These bits of evidence make me think that some extraneous formatting is being exported when saving as docx. 

Expected Results:
NO bullet or number when exporting.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Version: 6.4.4.2
Build ID: 1:6.4.4-1
CPU threads: 8; OS: Linux 5.6; UI render: default; VCL: gtk3; 
Locale: en-US (en_US.UTF-8); UI-Language: en-US
Calc: threaded