Inconsistent CSS resolution order between development and production

[GabenGar]

Reproduction

https://github.com/87906913/408919357/tree/main/react-router/invalid-css-resolution-order

Reproduction steps are in the readme.

System Info

System:
    OS: Windows 10
    CPU: (4)
Binaries:
    Node: 22
    npm: 10

Used Package Manager

npm

Expected Behavior

CSS resolves consistently between environments.

Actual Behavior

CSS resolves differently between environments.