When first entering text into the browser REPL, fetchConnectionInfo() is called multiple times by the autocompleter, when it should really be called once.

https://github.com/mongodb-js/mongosh/blob/bbe3826944dc721996a964ab7676a56e42710749/packages/browser-runtime-core/src/open-context-runtime.ts#L51-L55

This is probably happening because that code does not handle concurrent getCompletions() calls properly.