Ghosting flare is well controlled, and veiling flare (haze) is usually well controlled. However, direct sunlight striking the front element can be a problem, causing a hot spot of veiling flare to appear, as in the example below. A small change in lens position can greatly reduce the effect. I was able to provoke this effect at will with small changes in camera position. Choice of aperture seems to make little difference.
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Hot spot flare @ f/4