Volumetric Cloud + Sky Atmosphere Aliasing

I decided to try out the Environment Light Mixer.
For some reason, the Sky-Atmosphere and Volumetric Clouds are producing severe Aliasing.

This wasn’t a problem for this project when I used a SkySphere with a cloud material.
If I use the “Unlit” view the aliasing is not present.

Is there something obviously stupid that I’ve done wrong here?

All help is appreciated.