When you insert a cross-reference, a dialog comes up for selecting what you'll be referring to. I won't comment on the dialog's design in general, only about the list of items of the chosen category (headings, numbered paragraphs etc). This list is presented in plain text - which is ok, but it's directed LTR and aligned left-to-right. It is kept on a single line.
What this means is, that instead of seeing the _beginning_ of the paragraph, or line, or heading, you see its _end_. To see the beginning you need to scroll to the right - but it's a different amount of scrolling for each item, because they're not all aligned at the beginning. That also means you don't see the number except on shorter paragraphs, and for the current item, which also appears at the bottom and is thankfully right-aligned if its in an RTL language.
An example of this in the cross-reference selection dialog is attached.
This is actually a really old issue, probably from before v5, and I'm pretty sure I saw it on Windows too. Right now I'm seeing it with v126.96.36.199 release on Devuan GNU/Linux.
*** This bug has been marked as a duplicate of bug 131725 ***