It looks like when I open a folder (let say folder A) for the first time it will auto scroll to the bottom, but the second time, it stay still. But if I open another folder (folder B), and open folder a again, it will then jump again to the bottom. Really strange. I'll try to make a screen recording to show you the problems.
I've added a screen cast on the first post.
I know it's a bit too small, but please notice, the selected folders, and how it jumped to the base of the navigation pane when it was opened.
both with auto expand turned off and on, will give the same result for me.