Hello!

 I use pandoc 2.10.1.

 There are three documents in the attachment, in this way the result of the conversion is "1.docx- > 2.md- > 3.docx".

 I perform the сonversion with assistance by next commands:

 1.docx- > 2.md:

pandoc -s 1_en.docx -f docx+styles -t markdown -o 2_en.md -s

 2.md- > 3.docx:

pandoc --reference-doc 1_en.docx 2_en.md -f markdown -t docx -o 3_en.docx

 As a result, I get the following problems in output file 3.docx:

Crooked name «Content» + there is no filler in the form of dots between page numbers in the content, just specified pages (1_en.docx = yes.png; 3_en.docx = no.png)