Unity renders forward and referred at the same time.

The frame debugger revealed to me that before camera renders the scene in deferred pipeline, it's also rendered in forward for no apparent reason. I only have one camera in the scene, and i made sure noone calls Render() on it. It's set to the new deferred pipeline. I made sure the editor camera is facing away from the scene and the sceneView is not enabled during the frame debugging... still, i can see the entire scene being rendered twice. Here's the screenshot from framedebugger. First OpaqueGeometry(2785) renders forward, the second one (1196) renders the exactly same thing in deferred.

I noticed that renderTarget of the deferred calls is ImageEffects Temp... i have no active image effects on the camera.