[Bug] Consecutive calls to `setExtraLibs` fails to update an interface definition

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

function updateModelDefinition(propertyName) {
    var filePath = 'ts:filename/model.d.ts';
    var content = `interface Model { ${propertyName}: string }`;
    monaco.languages.typescript.typescriptDefaults.setExtraLibs([{filePath, content}]);
}

monaco.editor.create(document.getElementById('container'), {
	value: `const test: Model = {}`,
	language: 'typescript'
});

// This call works as expected
updateModelDefinition("immediate")

// Bug: Any future calls to setExtraLibs seem to be ignored
setTimeout(() => updateModelDefinition("afterTwoSeconds"), 2000);

setTimeout(() => updateModelDefinition("afterFiveSeconds"), 5000);

Reproduction Steps

Click run in the playground and wait a few seconds to let the timeouts fire and observe that the consecutive calls to setExtraLibs does not have the expected effect.

Actual (Problematic) Behavior

The editor keeps using the code provided by the first call to setExtraLibs, even if its called multiple times with new input.

Observe that the error in the playground example is incorrect:
Property 'immediate' is missing in type '{}' but required in type 'Model'.

Expected Behavior

The editor should respect the most recent call to setExtraLibs.

The playground example should after 2 seconds yield the error:
Property 'afterTwoSeconds' is missing in type '{}' but required in type 'Model'.

The playground example should after 5 seconds yield the error:
Property 'afterFiveSeconds' is missing in type '{}' but required in type 'Model'.

Start with the Monaco Editor Playground reproduction and the typescriptDefaults.setExtraLibs calls shown in the issue. Trace how successive calls are processed and compare the observed diagnostics with the expected latest interface definition. Done means each update is reflected in the editor, with afterTwoSeconds and afterFiveSeconds replacing the earlier property name.