[monaco]: duplicate hover tooltips

<img width="406" alt="image" src="https://github.com/vuejs/repl/assets/8372385/20ac9885-4756-4787-b0d8-46ccbf874d2d">
<img width="704" alt="image" src="https://github.com/vuejs/repl/assets/8372385/28bb2ff9-84bd-4278-a03b-b15e57a12055">


FYI:
 This only happens when open a new REPL browser tab via click a [link](https://repl-vuejs.vercel.app/). When refresh this tab, everything works, weird.