In the final v4 version, I only get half of the image denoised. It has a blurry border so it's mixing 2 halfs and one is not denoised.
In the octane render the issue is fixed if I move the camera. (only happens when I render the loaded scene)
I also have the blender plugin and there I didn't find a way to see the complete denoised image.
also, you can see that the half is the closest to square so one is divided horizontally and the other vertically
another baked image to better see the effect:
Win 10 2080ti driver416.81 32GB Octane 4.00