Shadergraph scene depth node all white

I have set up a full-screen shader with a custom render feature, and put a Scene Depth node straight to the output with a screen position for the UV's.

The output is the entire screen changing color, with different viewing angles, and objects positioned right in front of the camera.

I can't figure out what's going on, it seems super simple but I'm obviously missing something...

Shadergraph setup

https://preview.redd.it/t71w6hu09rff1.png?width=936&format=png&auto=webp&s=66fdd1b9ff130bddb06f6576cb6cef9433beb722

Nothing in front of camera

Any help is apreciated :)