Shadow Render Layer is wack

[figure1a]

When I do my renders, I have been outputting a shadow layer so that I can lay it back over my backplate file in Photoshop. Then I lay my car on top of that. This gives me the best post editing control for fine tuning in my final retouching. So far it's been working great except for this file. Where are these huge dark areas coming from on my shadow layer? You can see it's not in the RGB composited layer from KS. Any ideas?

[figure1a]

Just figured out where the problem is generating but not sure why it's doing it. I have a ground plane underneath the car which I sink the car into by just a few mm so the tires have a more realistic sitting effect (slightly flat on the bottom). I've never had this problem before and am not sure why the ground plane is making this huge shadow that does not show up on the RGB render but does show up in the Shadow Layer. Is this a bug or something I've screwed up somewhere?

[Niko Planke]

Hello figure1a,

We would like to investigate the issue closer.
This issue appears to be file specific, or specific to your render settings.
Also to me the shadow pass looks in general off to me.

It might be easiest for us to figure this out if you could send the file.
Would that be possible?

You can send data securely via our WeTransfer. Send to niko-at-luxion-dot-com.

Thanks