In LibreOffice Writer, paragraphs and some other elements can have their direction set to one of: RTL, LTR, or "Use superordinate object settings" (i.e. inherited).
The "superordinate object" for paragraphs on a page of a (simple) document is _not_ the page (which itself can have a direction LTR or RTL), but rather something else - likely, the entire document.
There LO writer UI, to my knowledge, does not offer a way of changing this top-level direction. Specifically, it's not an option via File | Properties on the menus, nor is it kept in sync with, say, the Default Page style.
There should be UI for changing this (or, alternatively, the document should not _have_ a direction at all)
Steps to Reproduce:
User Profile Reset: No
OpenGL enabled: Yes
I think LO has had this issue always, so I chose the earliest version on the list.
Also, I feel this is probably a dupe, but I couldn't find it reported.
Oh, wait wait! I was wrong. the paragraphs _do_ inherit the page style. But there's another bug which masks that. Closing this for now.