### 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

13.1.6

### What operating system are you using?

Ubuntu

### Operating System Version

Ubuntu 21.04

### What arch are you using?

x64

### Last Known Working Electron version

None. Electron 10, 11, 12, 14 are all affected, too.

### Expected Behavior

Nothing should happen

### Actual Behavior

1. Have a page with a webview with a link which includes a `#` (e.g. `<a href="#">Test link</a>`)
2. Zoom the page in via `webContents.setZoomFactor(1.1)`
3. Reset the zoom via `webContents.setZoomFactor(1.0)`
4. Click the link

The page itself stays normal while the webview gets all the way zoomed in and its `zoomFactor` is set to `NaN`.

### Testcase Gist URL

https://gist.github.com/ffflorian/2c60315bfafed606723887a7b2f21010

### Additional Information

![image](https://user-images.githubusercontent.com/5497598/125257302-93d8e300-e2fd-11eb-9a1a-a0a9fbdca258.png)
shell/browser/web_view_guest_delegate.cc
content::WebContents* embedder_web_contents,
    int embedder_frame_id) {
  embedder_web_contents_ = embedder_web_contents;
  int embedder_process_id =
      embedder_web_contents_->GetMainFrame()->GetProcess()->GetID();
  auto* embedder_frame =
      content::RenderFrameHost::FromID(embedder_process_id, embedder_frame_id);
  DCHECK_EQ(embedder_web_contents_,
            content::WebContents::FromRenderFrameHost(embedder_frame));
  content::WebContents* guest_web_contents = api_web_contents_->web_contents();
  
  
  
  
  
  
  embedder_web_contents_->AttachInnerWebContents(
      base::WrapUnique<content::WebContents>(guest_web_contents),
      embedder_frame, false);
  ResetZoomController();
  embedder_zoom_controller_ =
      WebContentsZoomController::FromWebContents(embedder_web_contents_);
  embedder_zoom_controller_->AddObserver(this);
  auto* zoom_controller = api_web_contents_->GetZoomController();
  zoom_controller->SetEmbedderZoomController(embedder_zoom_controller_);
  api_web_contents_->Emit("did-attach");
}
void WebViewGuestDelegate::WillDestroy() {