Messed up reflections with cube render target

Hi Andrew.

Sorry for the late reply, i gave up on this back then and thought id wait a couple of updates. Im back now with the latest version (4.10.4) But the issue is still the same.

To recreate simply make a new black scene,
Duplicate the standard floor mess thats alredy in there and make a wall and ceiling,
Recalculate lighting
Apply basic reflective material to all 3 surfaces.
Add scene capture cube and render target cube.
Add Sphere reflection capture and post process volume.
Enable SSR quality in post process volume to 100

You will notice that the Texture render target struggles badly with SSR.

I also tested the 2d capture cube and that works fine.
Please see images attached, which are named according to whats going on.

All i want to do is to capture a 360 image with the same quality as a normal highres screenshot from UE. Is there perhaps another way? A lens or fov setting in the normal camera such as in vray?

Thanks