This is the fix for the article viewer not scrolling back to the top when loading a new article, as suggested in https://bugs.kde.org/show_bug.cgi?id=382587 comment 2. In theory this should not be necessary as the article is scrolled to the top via JavaScript, but this does not appear to work in the reported cases.
As an added bonus, this change appears to improve the performance of the application when moving between articles with "Next unread article" or similar, the change happening instantly instead of there being a perceptible delay. However, this is just my subjective observation.