Upscale render texture problem

I updated from 2018.2 to 2019.2 and when I press upscale to render texture in the pixel perfect camera component and maximize game window. My game will appear on the bottom left and everything else black. Is this a bug?, how can I keep showing pixel perfect?

This can be solved if I increase the reference resolution, but then the character for example will show up really small. Im looking to achieve something similar to hyperlight drifter resolution but with upscale render texture to avoid diagonal pixels.

Any idea?

 

I think the problem is the new post processing effect. Ok just for reference, I solved it by simply moving the post process layer component up on the camera so that the pixel perfect camera appears underneath. Such an easy fix...