GLES2 2D Control Nodes not rendering in VR Viewport

[NeoSpark314]

I am at the moment trying to implement a basic movement vignetting effect using a ColorRect with a custom shader.
When using a 2D Control node like for example a ColorRect on Desktop it will be rendered after the 3D scene into the view. On Oculus Quest it is not visible.

I looked into a Renderdoc trace and it appears that the colorrect is rendered twice as expected but not into the external texture like the 3D draw calls but into a new/separate texture that will not get displayed:

Normal 3D draw calls

2D Draws:

EID 177 and 332 are the ColorRect draws.

[vansoest]

Same problem here with the Nvidia FXAA shader port:
https://gist.github.com/vansoest/e81d57e26447de432b2920f20ebb637d

[BenMcLean]

I have same problem, please fix.

[balintbarna]

same problem, can't render 2D stuff on main viewport