[Bug] When multiple Monaco editors exist simultaneously, the theme of each editor is forced to be unified

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 Link

https://microsoft.github.io/monaco-editor/playground.html?source=v0.47.0#XQAAAALRAgAAAAAAAABBqQkHQ5NjdQ_RJUhUwcsQIjjaoVayL-wYsMegjl4CeMe41v0rTlvQg_cBWS-b8aKgtqNV_EaBcxS_fzmS3coRB-IUAZyHk6adB6Fs2WGc2NlTO8dS2o-OecOzEBgerpUkIz_W1TLfpyf-wT0AH0ls9IOttAtxY9uWs7n9RY7yvoNkhFoczkjako1__1VsJA4Hbo-zC8JsKH90CD5mrl5KFd4lqQzQ63vMMnapr9wYbN3mM-N9cKSu9JagbHGR54bVOpVvbl1lxSY_14K9IPw-daMLHK3IhYVsNfIDyW4c46-J7i6PqF8CABVF5pMTdGNSAFAIjjG10MUHwMqdIXN1ofTW0HUXAWYEMfZH370HubTKX1QTwki4RYAS6A0rAlnCISY9fhoO55VVW8qQ5KdV2keowfzLZK1rPnSTO__jwwyDMKyxMBiq31b72zBY

Monaco Editor Playground Code

const value = /* set from `myEditor.getModel()`: */ `function hello() {
	alert('Hello world!');
}`;

// Hover on each property to see its docs!
const myEditor = monaco.editor.create(document.getElementById("container"), {
	value,
	theme: 'vs',
	language: "javascript",
	automaticLayout: true,
});

const value2 = /* set from `myEditor.getModel()`: */ `function hello() {
	alert('Hello world!');
}`;

// Hover on each property to see its docs!
const myEditor2 = monaco.editor.create(document.getElementById("container2"), {
	value,
	language: "javascript",
	theme: 'vs-dark',
	automaticLayout: true,
});

Reproduction Steps

1、Create an editor and set the theme to 'vs'
2、Create a second editor with the theme 'vs-dark'

Actual (Problematic) Behavior

The themes of the two Monaco editors are the same

Expected Behavior

Each Monaco editor should apply its own theme

Additional Context

No response

Start with the linked Monaco Editor Playground reproduction and inspect how the two editor instances apply the theme options 'vs' and 'vs-dark'. Confirm the shared-theme behavior, then verify that each editor can retain its configured theme without affecting the other and rerun the two-editor reproduction to confirm the result.