I have several long documents and used to have the option of they’re opening at the bottom, so I don’t have to page all the way down every time I open them.
Your last position is only saved per-user; so LibreOffice needs to have your user details at Tools
-Options
-LibreOffice
-User Data
.
I filled in the data: <personal data removed>
You might want to reconsider posting your personal data and email on a public forum.