Stale scroll position is restored after opening blog post

Steps to reproduce:

Ensure the blog feed has at least a screenful of posts
Scroll down a few posts
Rotate the screen to landscape and back to portrait
The scroll position is remembered, as expected
Scroll down a few more posts
Tap on a post to open it
Use the back button to return to the feed
The scroll position jumps back to where it was when the screen was rotated