Wierd profiler hence in GPU

I've spotted after upgrade from 3.x to 4.x a wierd hence in GPU profiler caused by RenderTexture.SetActive. From where does it could came?

Info:

I have all screen effects disabled.

The hence is always attached to the first camera listed in profiler.

Even if i'll disable ALL elements on scene, leaving the camera, the hence is here still

![alt text][1] [1]: /storage/temp/14857-profilermain.png