Created attachment 166185 [details]
DOCX compared MSO 2016 LO 7.1+
1 page DOCX attachment 166174 [details] opens wrong, without frame from header.
It's MSO created DOCX from DOC attachment 117968 [details] from bug 61967.
Created attachment 166188 [details]
Full 12-page MSO created DOCX from original DOC, for test.
Created attachment 166189 [details]
Other DOCX that looks good
Other DOCX with frame in header looks good in LO. From bug 65881.
Build ID: a9976a958b2857e308c6598532151878615bfd9f
CPU threads: 4; OS: Linux 5.7; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Created attachment 167907 [details]
Very simple reproducer document
I managed to reproduce the problem.
We need one frame in Word with two (does not happen with one) paragraphs.
One of them also needs a paragraph border set.
Open it in Writer and boom: no frame :)
This frame does not need to be in the header, breaks in the document body too.
Created attachment 167908 [details]
Screenshot of the reproducer document in Word and current master
Version: 22.214.171.124.alpha0+ (x64)
Build ID: 561e5559bb68242c7f785f0ca3bee3eb12b58963
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: default; VCL: win
Locale: en-US (hu_HU); UI: en-US