- Open github.com homepage. Units activates on the news feed first item.
- Scroll down till the bottom and click on on 'More'. This generates a list of new feed items.
- Units highlight changes and starts again from the topmost visible unit on page. (Ideally it should start at the first new unit (feed item) generated.)
I think what happening is that since the 'more' unit is gone, it resets itself. It's something very trivial, thought I'd let you guys know :-)