Model clamped to 3D Tiles not working well in the "Clamp Entities to Ground" Sandcastle

[kring]

What happened?

1. Visit the Clamp Entities to Ground Sandcastle example.
2. Switch the second dropdown to "Draw Model"
3. The model will not be properly placed on the surface.

Switching to other options in the dropdown and then switching back doesn't help.

Clamping to terrain looks ok, it's only 3D Tiles that are a problem.

Initial View:

View after zooming out a bit:

Reproduction steps

No response

Sandcastle example

https://sandcastle.cesium.com/?src=Clamp%20Entities%20to%20Ground.html

Environment

I can reproduce this in Chrome 137.0.7151.41 on Windows with an NVidia RTX 3070 Ti and on an M4 MacBook Pro. The initial view is a bit different on the Mac, but the overall situation - the model is not placed on the surface - is the same.

[kring]

Possibly related issues:

• #12602
• #12195