A quick PS, this issue is probably related to a wider, slightly more annoying one, which is that the edit point where the cursor is, or the last edit was made) disappears when you split the editor window, or return to a single window, or open and close the Inspector panel, etc., etc.
If possible, I would like the text I’m working on to stay put whenever I do any of these things.
Can’t speak for jje, but it seems to work correctly in single document mode, while in scrivenings mode it doesn’t (no cursor in any of the scrivenings, not just the last document worked on). Note that I am working with very small documents in this work journal project (one or two lines per document on average), so that may affect what jje is reporting.
If I split the document when the Inspector panel is not open, the insertion point remains visible (although I cannot understand why it’s at the bottom of the right-hand panel; I would prefer it to stay in the middle of the left-hand one):
In the next update the cursor will be centered.
If you use fixed width editor mode, the cursor will not move out of view upon show/hide the Inspector.
I have added the cursor move out of view in non-fixed editor width mode to our bug tracking system.