Just updated and trying now (guess my TestFlight app was uninstalled?)

Seems like it’s not quite fixed … but better? Timeline now doesn’t jump as I’m reading it (much better) but it also doesn’t return to the post I had “clicked on” after returning to the timeline.

It’s different after updating, in that the timeline location returned to (after waiting “a bit” for new posts to be available) is “above” (showing newer posts) the “clicked” on post rather than always bellow it (showing older posts).

And yes… now that you mention it, I do see some relation to “unread” in how far the timeline jumps.