[Bug] Semantic validation across multiple editor instances

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Code

monaco.languages.typescript.javascriptDefaults.setDiagnosticsOptions({
  noSyntaxValidation: false,
  noSemanticValidation: false
})

monaco.languages.typescript.javascriptDefaults.setCompilerOptions({
  allowJs: true,
  checkJs: true,
  allowNonTsExtensions: true
})

monaco.editor.create(document.getElementById('container1'), {
  model: monaco.editor.createModel('const abc = 1', 'javascript', monaco.Uri.parse('file:///a.js'))
})

monaco.editor.create(document.getElementById('container2'), {
  model: monaco.editor.createModel('const abc = 2', 'javascript', monaco.Uri.parse('file:///b.js'))
})

<div id="container1" style="height: 50%"></div>
<div id="container2" style="height: 50%"></div>

Actual Behavior

Both editor instances prompt "Cannot redeclare block-scoped variable 'abc'." error.

Expected Behavior

No error prompt. It should be possible to use variables with the same name in two different files.

Additional Context

No response