Disorder when setting the eyeoffset

### What happened?

When setting the display sequence of icons at the same position through the "eyeOffset" function, a problem of layer disorder occurs. This issue does not appear in version 118, but it does occur in version 139 when viewed from different angles and at different layers.

### Reproduction steps

1.
2.
3.
...

### Sandcastle example

https://sandcastle.cesium.com/#c=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

### Environment

Browser:
CesiumJS Version:139
Operating System:

### AI acknowledgment

- [ ] I used AI to generate this issue report.
- [ ] (If the above is checked) I have reviewed the AI-generated content before submitting.

Start with the linked Sandcastle example and reproduce the layer disorder when setting icon display order through eyeOffset in CesiumJS 139. Compare the result with version 118 while viewing from different angles and layers. Done means identifying and correcting the regression so the icons render in the intended order.

Written by the indexing model from the issue text.