Why is displacment significantly changing the color of my landscape?

Here it is before the displacement is applied/toggled on:

And here it is afterwards. Any thoughts?

Seems like it might be somehow related to culling as it disappears with distance or camera angle? But I’m certainly not an expert on that

landscape

And while we’re at it, is there a reason the displacement isn’t showing up when I turn on path tracing? Even if I rebuild the data it doesn’t show up.

Let me know what you think.
Thanks!!