Having Issues Dragging items after Foilage

I am using grass foilage and editing the landscape and the moment I do this whenever I place an object or try to move the Playerstart item it doesn’t move or respond whatsoever even though when I backspace it says I did move it. And when I place an object such as a cube in my desired place it atomatically transports itself to the center of the field underneath the ground. Is this a bug I’m using UE 4.11?

I get this “X” shape that all the objects go to whenever I place it on the map and I can’t move or drag any objects