My Camera Viewport does not match the render result

Development Rendering
1

My Camera Viewport does not match the render result

This is really odd. I am using a CineCamera in my Level Sequence.
I do have manual exposure control, what so ever.

Fact is, when rendering the image rendered looks always brighter than when looking through my cine camera.

What the heck is going on here?

I am not using even a PPV to override anything.
I amusing the latest 5.5.4

Thanks a bunch for any ideas what I could be missing here.