unicode characters in :after css breaks

[arnoudb]

project settings:

@angular/cdk: 21.0.0
@angular: 21.0.0
@oxc-angular/vite: 0.0.20
typescript: 5.9.0
vite: 8.0.3

Issue description

When placing unicode character in an :after selector like:

 .test-div:after {
    content: '\2022'; 
  }

It doesn't work as expected. I created a small app to demonstrate. Here is the output with the new oxc compiler:

here's the output with the default angular cli compiler

Here is the test app:

https://github.com/arnoudb/analog-oxc-angular/tree/css-error

Maybe i'm missing a setting. Not sure but seems like a bug