Repository: create-react-app
Issue: Random static/MEDIA directory vs static/media
Labels: needs triage,issue: bug report

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### Describe the bug

The build command is randomly creating static/MEDIA directory for font files which is causing issues when the app is deployed.

### Did you try recovering your dependencies?

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npm -v: 6.14.8
npm ls react-scripts:
  react-scripts@4.0.1
npm ls file-loader: 
  `-- react-scripts@4.0.1
  `-- file-loader@6.1.1


### Which terms did you search for in User Guide?

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Deployment, MEDIA

### Environment

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Environment Info:

  current version of create-react-app: 3.4.1
  running from 

  System:
    OS: Windows 7 6.1.7601
    CPU: (8) x64 Intel(R) Xeon(R) CPU E3-1585L v5 @ 3.00GHz
  Binaries:
    Node: 12.20.0 -
    Yarn: 1.22.10 - 
    npm: 6.14.8 - 
  Browsers:
    Internet Explorer: 11.0.9600.19867
  npmPackages:
    react: ~17.0.1 => 17.0.1
    react-dom: ~17.0.1 => 17.0.1
    react-scripts: ~4.0.1 => 4.0.1
  npmGlobalPackages:
    create-react-app: Not Found

### Steps to reproduce

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In a project with font files:

1. Run `npm run build`

### Expected behavior

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I expect the static/media directory to be lowercase so that my app properly serves font files.

### Actual behavior

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I'm randomly receiving:

I:.
└───static
    ├───css
    ├───js
    └───MEDIA

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