### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
- [X] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success.

### Electron Version

12.0.5

### What operating system are you using?

macOS

### Operating System Version

11.2.3

### What arch are you using?

arm64 (including Apple Silicon)

### Last Known Working Electron version

_No response_

### Expected Behavior

`document.hasFocus()` is only `true` for the window that has focus.

### Actual Behavior

Ever window reports `document.hasFocus()` to be `true` right after opening.

### Testcase Gist URL

https://gist.github.com/16e6fc829febd0cab115dfd0850a31be

### Additional Information

_No response_
shell/browser/api/electron_api_web_contents.h
std::unique_ptr<WebDialogHelper> web_dialog_helper_;
  scoped_refptr<DevToolsFileSystemIndexer> devtools_file_system_indexer_;
  ElectronBrowserContext* browser_context_;
  
  
  
  
  std::unique_ptr<InspectableWebContents> inspectable_web_contents_;
  
  typedef std::map<std::string, base::FilePath> PathsMap;
  PathsMap saved_files_;
  
  typedef std::
      map<int, scoped_refptr<DevToolsFileSystemIndexer::FileSystemIndexingJob>>
          DevToolsIndexingJobsMap;
  DevToolsIndexingJobsMap devtools_indexing_jobs_;
  scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
#if BUILDFLAG(ENABLE_PRINTING)
  scoped_refptr<base::TaskRunner> print_task_runner_;
#endif
  
  content::RenderFrameHost* fullscreen_frame_ = nullptr;
  service_manager::BinderRegistryWithArgs<content::RenderFrameHost*> registry_;
  base::WeakPtrFactory<WebContents> weak_factory_{this};
  DISALLOW_COPY_AND_ASSIGN(WebContents);
};
}  
}  
#endif