Stereo render DebugCanvas and UMG in 2D

I’m currently writing a plugin to support stereo rendering on a custom 3D-monitor and I’m having trouble getting the DebugCanvas and UMG to render in stereo.
So far I have been able to implement stereo scene rendering by overriding the Engine and assigning the StereoRenderingDevice to my custom IStereoRendering extended class. But the UMG and DebugCanvas are still rendering in mono over my 2 stereo layers.

Any help is greatly appreciated.