Zoom broken in 3D Orthographic when pixelRatio != 1

[andrewda]

What happened?

Zooming in 3D orthographic view is broken at high camera heights when pixel ratio is not 1. See the attached video:

CleanShot.2025-02-19.at.11.52.56.mp4

Reproduction steps

1. Open the attached Sandcastle link on a device with a pixel ratio greater than 1 (e.g., Macbook Pro with Retina display)
2. Zoom in and out

Sandcastle example

https://sandcastle.cesium.com/#c=bZBBa8MwDIX/ismpheKw65qGbYXtMih0YydfXEdNzGwpSHZCN/bfl7SX0VW3J71PesgRSlKDhxFYbRTCqLYgPkf9ce4tTOHOekuYrEdgU6zUt0GlssAT0yjAe3AUI2ADzR6EQk6e8F4dbRBYGfxZrg0avBzR4gBBt4EOoKWj8YUpY/OYIknfAcOU4gyurwhnI7DVMvrkunfaceqoZdt33j1zlpTjYrkuVkUl6RSgnhPO9eBjT5xU5rDQukwQ+2ATSHnI7hOSdiJzvNlalX/RqvGD8s3mxgOUC1ZkmhxzCG/+C0xRV+Xk/4cGso3HdjcAB3uabd1d/Xppaq2rcpK3yUQUDpavNv8C

Environment

Browser: Chrome v133
CesiumJS Version: v1.126.0
Operating System: macOS 15.3.1, Retina Display