We are having the same problem, and no solutions yet? Scene Capture does’t give the same results as a regular cine camera. Hope Epic can fix these problems.
You can use Pro SceneCapture2D to solve these issues. All you need to do is attach the ProSceneCaptureComponent2D component to the CineCamera, and the captured render target will have the same effect as the viewport!
I set the CineCamera’s focus on the frontmost metal sphere to achieve a depth of field effect. As you can see, the captured render target matches the viewport exactly, preserving the CineCamera’s Lumen and post-processing effects (with depth of field being part of the post-processing).