Up until recently writer was saving cursor position. As of a couple of months ago this stopped working. The version I am currently using is 7.4.2.3.
Personal data is all setup. Document position had been saving fine for quite a while. Recently, with one of the updates in the last few months, it stopped working. In the main document I have noticed this on, a daily work diary, for a while it would drop the cursor at the last location before the feature stopped working. Now it just goes to the top of the document.
It seems it is functional in LibreOfficeDev_7.5.0.0.alpha1 (you can download it from pre-releases Index of /pre-releases/).
I tested it yesterday and it reads and renders whole document and then it set the cursor to the last saved position. Not read and render gradually without the remembering of position like in some previous versions.