For whatever it’s worth, i’m not having this issue anymore. A few weeks ago I upgraded my graphics card. Recently I was running a EVGA GTX 560ti, I now have a XFX R9 270X (AMD card)… It may be the lack of GPU muscle, but who knows exactly. (Not sure if the guys at Epic continued to work on the problem, if there are others with this bug)…But yeah…UE4 runs like a champ now! 
(Now if I can get this ■■■■ tree shader I built in UDK transferred into UE4 that would be great)…But I digress…