Build Version runs with laggy camera...

Hey Unity-Community,

My Game is running fine in the editor, but as soon as i build it, the camera is very laggy, with a one-second delay, all other stuff runs fine though.
I build my game before (maybe a month ago) and it ran fine.
After that I DIDNT change anything in the camera code, nor did I add an additional camera.
Maybe it has something to do with the Update to 5.1.2 ?

Additional info:
My TimeScale is set to 1, and the fixed time Update to 0.02.

Even the “Powered by Unity” Logo at the beginning is lagging, but again, the game itself runs fine after that, just the camera!

Installed 5.0 again, and look here… the build version runs smooth as always! Weird, should i report that as a bug?