[Bug] The decorator created does not take effect

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

No response

Monaco Editor Playground Code

No response

Reproduction Steps

No response

Actual (Problematic) Behavior

It doesn't really work.

Expected Behavior

I want to render the specified content green

Additional Context

function getPosition(v: string) {
  if (!editor) return;
  const model = editor.getModel()!;
  const content = editor.getValue();
  const startIndex = content.indexOf(v);
  if (startIndex === -1) {
    return;
  }
  const endIndex = startIndex + v.length;
  // Get start and end positions
  const startPosition = model.getPositionAt(startIndex);
  const endPosition = model.getPositionAt(endIndex);

  const startLineNumber = startPosition.lineNumber;
  const startColumn = startPosition.column;
  const endLineNumber = endPosition.lineNumber;
  const endColumn = endPosition.column;

  return { startLineNumber, startColumn, endLineNumber, endColumn };
}

editor.setValue(value);
const position = getPosition(props.data.version);
if (position) {
  const { startLineNumber, startColumn, endLineNumber, endColumn } = position;
  editor.createDecorationsCollection([
    {
      range: new monaco.Range(startLineNumber, startColumn, endLineNumber, endColumn),
      options: {
        inlineClassName: 'version-decorations',
      },
    },
  ]);

.version-decorations {
  font-weight: bold;
  font-style: oblique;
  color: green !important;
}
  

Start with the provided getPosition and editor.createDecorationsCollection snippet, then reproduce it in a minimal Monaco editor setup while checking the decoration range and inline CSS class. Done means the specified content renders green; the issue provides no file, test, or complete reproduction to guide further investigation.