Strange reflection in shadow with PBR + Distant Light

#1
When using PBR material and upon adding a Distant Light I get a strange brightness in the shadowed area under the cubic shaped object.

In the first render this can't be observed:

1.jpg


In the second one, upon adding a PBR material to the plane:

2.jpg


Is this a bug? Maybe @Martin can you provide some insight on this?

Thanks

Chris
 
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