Hi!
I use LO with CLI to convert .docx to .pdf and faced with this issue.
I use LibreOffice 7.6.4.1 and noticed one moment with URLs that LO removes additional space (%20).
Example link: https://google.com/Reference%20%20Materials/Tools%20%20-%20CPMC%20Approved%20List.pdf
I have .docx file with correct (above) link. If I open this file in LO - everything is ok and I can see double space in link.
If I save w/o changes this file using LO (word 2007 or 2010 .docx) I can see that everything is ok when opening this file in MS Word (I have 2 spaces in link) but opening this file in LO shows me only one space : https://google.com/Reference%20Materials/Tools%20-%20CPMC%20Approved%20List.pdf
If I open resaved with LO file and export to PDF - I also have link with one space.