Rendering Bug (Disappearing Blocks with different Viewangels)

Looking down my Staircase i noticed, if i rise my head above a certain level i can see everything just fine, lowering the angel however make the wall at the end disappear.

Pictures Included: Looking down with both versions, seeing and not seeing the Blocks at the bottom and the coordiantes in front of the Wall, looking up. Everything with F3 on for detailed informations.