The Armour on these leggings is missing when you roll your mouse over the item. It is displayed when you click and go to the page.
This is just one example, but there are many that have this issue (if not all?)
Hello; thank you for bringing this to our attention. I checked, and the same thing was happening for weapons also. In the next Lorebook update, both the armour and weapon tooltips will display the same information seen on the actual item page.