Pixi3d mesh with texture is flipped when projecting on a PIXI.RenderTexture?

Question

I am using PIXI to render 2d elements and PIXI3d library for 3d elements. In my current project I have to draw a 3d cube rotating on 2d background and generate an mp4 as an output. to create mp4 i am using rendertexture to generate each frame of the animation. But in doing so the cube is getting flipped when the container is mapped on a render texture.

Code Sandbox

Thanks in advance.