Steps:
- scroll down so that you can see both "B" section and "C" section, so that "C" section will be at the middle.
- click on any item above "C"
The bug: the item changes its text and then animates below "C".
Even worse: if you remove enough items, and you click on an item above "C" section, it thinks you've clicked on a header.
Here's an animation showing the issues:
