[graphiql] Unknown operation named 'xyz'

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

Using the latest of GraphiQL from CDN, having multiple queries works on initial page load. Refreshing the browser ignores other queries/mutations and runs the first query.
I am unable to select any other query/mutation on the play button:

As you can see, I have two different queries. When pressing the play button (or Control + Enter) I get the error. The query 'search' was originally the first query on the editor, but I removed it.

### Expected Behavior

Whatever queries are on the editor should appear as options on the play button.

### Steps To Reproduce

1. Using latest GraphiQL version, create multiple queries. Refresh the page and attempt to run any other query other than the first one on the page.

### Environment

* GraphiQL Version: latest
* OS: MacOS
* Browser: Chrome
* Bundler:
* `react` Version: 16.8.3
* `graphql` Version: GraphQL Java 21.3

### Anything else?

_No response_