Custom ShaderGraph shader in skybox breaks single pass instanced rendering

Running a plain vanilla project in Unity 2020.3.0f1 with URP version 10.3.2. I created a simple gradient shader in shadergraph and set it as the skybox material in the example scene.

Here's the shader: View attachment 830980

On both an Oculus Rift S and Quest 2 via Link, it works fine on multipass rendering but as soon as I switch to single pass instanced I get this:

View attachment 830983

URP version 7.5.2 seems to not have this problem. Is this a known issue?

EDIT: Also...

Custom ShaderGraph shader in skybox breaks single pass instanced rendering