Description:
Hello, Excuse me, I use Linux Ubuntu 18.04.6 and LibreOffice 7.4.0.3. I noticed that there Border has a little problem when I was setting a Border for the page. I had set  Thin Thick, Medium Gap Border (Thin Inside, Thick Outside) which I noticed that the corners of the border had a overlap problem, although in version 7.3.5 only the upper corners of border had overlap and the lower corners hadn't this problem. Of course, Thin Thick, Medium Gap Border (Thin Inside, Thick Outside) has problem and only and Thin Thick, Medium Gap Border (Thick Inside, Thin Outside) hasn't this problem.
Of course, I don't know only this border have this problem or other there are borders that have this problem.

notice to this video:
https://drive.google.com/file/d/1HEnv0uKDTV-I5pARdXw3sYeA5Eh5l_Np/view?usp=sharing

a simple .dot file for test:
https://drive.google.com/file/d/1KTnxODkRimMP3IsARIi3jIn6FC3saYB5/view?usp=sharing

Thanks for your consideration.

Steps to Reproduce:
1.Go to Page from Sidebar.
2.Click on More Option in Format Sextion.
3.Go to border tab and set Thin Thick, Medium Gap Border (Thin Inside, Thick Outside) with 7.00 pt width.

Actual Results:
Thin Thick, Medium Gap Border (Thin Inside, Thick Outside) have overlapping corners.

Expected Results:
Thin Thick, Medium Gap Border (Thin Inside, Thick Outside) should be as Accurate as like Thin Thick, Medium Gap Border (Thick Inside, Thin Outside).


Reproducible: Always


User Profile Reset: Yes



Additional Info:
[Information automatically included from LibreOffice]
Locale: en-US
Module: TextDocument
[Information guessed from browser]
OS: Linux Ubuntu (All)
OS is 64bit: yes