Mirror in Vive Stereo Rendering Toolkit turns black on the edges

Hello,

I'm looking for a mirror for VR, and the asset that came closest to working was the mirror in Vive Stereo Rendering Toolkit. However, it does not display the entire mirror, but cuts off parts of it. This depends on my head position and movement: looking into the mirror from the side usually works pretty well, standing in front of it creates a mirror as displayed in the image. Any ideas what could solve this problem?

Best,
Marius

 

Same problem, any fix?

EDIT: Turning off scissor seems to have solved problem.