We recently made some changes to items that grant stealth detection. We felt these items provided a necessary advantage in competitive PVP and forced players to use lower level equipment even when more powerful items were available to them.
This item can no longer be used in the Arena:
We have removed stealth detection from the following items:
We have reduced the stealth detection of the following items: All of these changes are already active and the tooltips will be updated with the next minor patch."