Navigating browser history from short to long page truncates scroll position

[nyanpasu64]

This bug appears with JS enabled.

• On the homepage https://vector-of-bool.github.io/, click on a long article
• Scroll to the end
• Press the browser back button
• Press the browser forward button

The JS attempts to restore the scroll position to the end of the long article, but the DOM contents still store the homepage (which is shorter), truncating the long article. When the article loads into the DOM, the browser isn't scrolled to the end.