after build react app, css pseudo elements content is corrupted

should be content: "\e916"; (hex format)

but the result is content: ""; (char)

Use webpack 5.72 with require('mini-css-extract-plugin');

const cssRule = {
  test: /\.scss$/i,
  use: [
    {
      loader: MiniCssExtractPlugin.loader,
      options: {
        publicPath: '/',
      },
    },
    'css-loader',
    'postcss-loader',
    'sass-loader',
  ],
};

Can you advise how to fix this? Well thank you