[Bug] typescriptDefaults.setExtraLibs not working as expected

Reproducible in vscode.dev or in VS Code Desktop?

[X] 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 Link

https://microsoft.github.io/monaco-editor/playground.html?source=v0.51.0#XQAAAAK4BQAAAAAAAABBqQkHQ5NjdQultUhUwcsQIjjaoVayL-wYsMeg24JItvniWevaGyL6ot7GNI6RFj5KIZKnPs8bDABIDSRRqux-oVQT185N0-S9kY8B6TtqQu6-29b1SJjdE3dN-UK1KVtCc43xLj9Jo3QOMz5EH-2xH_NeNavjeq3BMdfl-VDtZ2z4OjBhFRpkU34K6geDzpm9ooZGKEw-1c_GUgYGqEt40F0TiTqOUENu33HWjGIMJoOed9lxM0i_6O2wc5leZUMgfmL5n_viyd8lS-EAz_5V70Qe81d8GDmQ_o6mJXIowRoIlmoe7j9JhyAXd_fvpo5iEjWJ9qMsLL6oLgAiZiEGCydSMzyxrjO_ScgGz1yYlQH-8HiFrosCXcN2p8FUU9tkdYs36UYzHdzIQ0vzvthQaPZg8-qOOJe_RgJyYYYZgyyy2mdncrHPRwWGegmz0o6n2NxsfNI43i7C-Ac3Aqlm_-nQl31MQdrbVTQb9ILdDFiBnIDpQAOu61BDhk8pxnirzVEjBQV4xrOprdpoTaSAq8z_MLAfWXNYZx3NEZq9-ALnVEvh2YanLIN3E3tt89YyIhgPEmh4CjfSs6TPh9LWavKNHV2GKqgIxyxShS2b2tDBcvWRduYVoPob7qD-gAawYRSn9yEd_m9rT69Qz7E2BrKKNva2wbjdb6jbep8W-9fuCdb3EZdGaskKppTIBNZ6l-b9OmTXADGUjrMyocd5kPPKB2RNN1ftYNOD8Hc__-R0qcc

Monaco Editor Playground Code

monaco.languages.typescript.typescriptDefaults.setCompilerOptions({
    allowNonTsExtensions: true,
    moduleDetection: 3, // @see https://github.com/microsoft/monaco-editor/issues/2976#issuecomment-2334468503
})

const myEditor1 = monaco.editor.create(document.getElementById("container1"), {
    value: `// when this editor has focus, line 2 should be valid and line 3 should show an error
const a = api.thisShouldWorkInTheTopEditor()
const b = api.thisShouldWorkInTheBottomEditor()
`,
    language: "typescript",
});

myEditor1.onDidFocusEditorWidget(() => {
     monaco.languages.typescript.typescriptDefaults.setExtraLibs([
        {
            content: `
                interface Api {
                    thisShouldWorkInTheTopEditor(): string
                }

                declare const api: Api
            `,
            filePath: 'globals.d.ts'
        }
    ])
})

const myEditor2 = monaco.editor.create(document.getElementById("container2"), {
    value: `// when this editor has focus, line 2 should show an error and line 3 should be valid
const a = api.thisShouldWorkInTheTopEditor()
const b = api.thisShouldWorkInTheBottomEditor()
`,
    language: "typescript",
});

myEditor2.onDidFocusEditorWidget(() => {
     monaco.languages.typescript.typescriptDefaults.setExtraLibs([
        {
            content: `
                interface Api {
                    thisShouldWorkInTheBottomEditor(): string
                }

                declare const api: Api
            `,
            filePath: 'globals.d.ts'
        }
    ])
})

Reproduction Steps

You see two editors, both show typescript errors
Focus the upper editor, line 2 get valid, line 3 has an error (correct!)
Focus the lower editor, now both lines are correct (error!)

Actual (Problematic) Behavior

setExtraLibs seems to merge the extra libs instead of replacing the existing libs

Expected Behavior

setExtraLibs should correctly replace all the existing libs

Additional Context

the latest version where the behaviour of setExtraLibs is correct is 0.36.1 . But I can't manage to isolate the modules in 0.36.1 without an export, so downgrading is no option for me

microsoft / monaco-editor

[Bug] typescriptDefaults.setExtraLibs not working as expected #4678