Selecting terrain in scene view doesnt show up in inspector

ok this is an odd one. I'm testing in Unity 5.3.3 and 5.3.3.p1

all is fine in a fresh project but for some reason in my current project there's this problem.
I've tried creating a new terrain, changing layers, clicking locks.. I've run out of ideas.

In unity 5.3.2 it's fine though.

selecting the terrain in hierarchy is fine too, only when selecting in scene theres the problem.