With Timeless skin, when you are clicking on a reference/note number in the text, it shows the reference/note at the bottom of the page (like everywhere else usually). But at this point, the clicked reference text is mixed (overflowing) on the previous reference text.

Example :
//References :

1. The book
2. The website
3. The article//

"2. The website" will be over "1. The book", and a free space will be between 1 and 3.

If you are clicking on another reference, the problem switch to the new clicked one.