Hand Moves when changing hotbar selection when there are no items.

If you switch the selected item in your hotbar, and the item you were holding was nothing (empty slot) and you switch to nothing (empty slot), the player's hand (first-person) moves down and back up. The hand should move down and up when the selected item changes, not when it doesn't change.

Here is a video showing it (it is on youtube because the file is a large size)