The bug

The tooltip for opening the packs folder moves with the cursor when you select the button with Tab, unlike all the other tooltips (like the quality of the graphics in the graphics options, or the gamerules in the menu for creating a new world).

How to reproduce

1. Press the Tab key several times while in the Datapacks and/or Ressource Packs menu until you reach the "Open Pack Folder" button
2. Move your cursor

Examples

Here is the behavior of the tooltip for the "Open Pack Folder" button:

Here is the behavior of the tooltip for the "Graphics Quality" button: