Problem - dark Border around Render Frame with Eevee Reflection Plane I'm just testing Eevee and got a strange border in the reflection on the ground.
The ground has  an easy shader wich is very glossy.
In the viewport all is corect but if I render it, I got this strange result.
I've play around with the settings of the material, render settings and the object data of the Reflection Plane (Light Probe).

I hope anyone can solve this problem.

Thank you
Solution!
Render Settings > Film  set Overscan to Active

It seems that Blender trimms the area outside the camera frame and dosen't consider this informations. That's the origin of the problem. A falloff starts form there. The overscan option let some information outsite the camera frame and the effect dosen't occure.

Why this musst be like that - I don't know.