Bear in mind that if you are navigating between multiple documents, with them all being displayed together in Scrivenings mode, then it does not save your cursor position (there is nowhere to save it since the session isn’t a thing that is saved in the project, but rather just a circumstance of how you view some things).
The one exception is if you use the history buttons, on the other side of the editor header bar, to jump between sessions. If you’re just bouncing back and forth between a few then it makes more sense to use that than adding to the history with new navigation events.