Kalista's W

Ever since Kalista was released there has been a bug with her W that I think hasn't been addressed yet. When a sentinel is killed it will still reveal anyone who walks past the last position it was facing towards, this effect will persist for quite some time after death, revealing the champion who triggered it for the full duration.

The reason that I'm calling this a bug is because a champion can be revealed even after the sentinel has been destroyed (it's been hit twice) and though this isn't entirely game breaking, it could give away a champions position and allow them to be ganked on a part of the map that would have otherwise had no vision (assuming that it was not warded).

I believe that the fix would be simple, (though I didn't script the mechanics) I think that it should just stop broadcasting it's vision upon death instead of continuing to cycle.