### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/main/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/main/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 bug report that matches the one I want to file, without success.

### Electron Version

18.0.3

### What operating system are you using?

Windows

### Operating System Version

Windows 10

### What arch are you using?

x64

### Last Known Working Electron version

18.0.0

### Expected Behavior

After entering and exiting fullscreen from an iframe and then focusing the parent page, <kbd>Escape</kbd> key events should be delivered to the parent page.

### Actual Behavior

<kbd>Escape</kbd> key events seem not to be delivered to the page after exiting fullscreen.

https://user-images.githubusercontent.com/172800/162848678-c067d18a-e323-49ea-a6b3-f1526149cad1.mp4




### Testcase Gist URL

https://gist.github.com/bc382eeeb368b70fbed1e177bcaacfde

### Additional Information

This only reproduces on Windows, not on macOS.

Also, this only reproduces when _clicking_ the "exit fullscreen" button in the YouTube embed. Pressing <kbd>Esc</kbd> to exit fullscreen allows the parent page to receive subsequent key events.

18.0.0 - not reproducible
18.0.1 - reproducible
18.0.2 - reproducible
18.0.3 - reproducible

This seems likely to be related to https://github.com/electron/electron/pull/32369. cc @codebytere 
shell/browser/api/electron_api_web_contents.cc
frame_subscriber_.reset();
}
void WebContents::StartDrag(const gin_helper::Dictionary& item,
                            gin::Arguments* args) {
  base::FilePath file;
  std::vector<base::FilePath> files;
  if (!item.Get("files", &files) && item.Get("file", &file)) {
    files.push_back(file);
  }
  v8::Local<v8::Value> icon_value;
  if (!item.Get("icon", &icon_value)) {
    gin_helper::ErrorThrower(args->isolate())
        .ThrowError("'icon' parameter is required");
    return;
  }
  NativeImage* icon = nullptr;
  if (!NativeImage::TryConvertNativeImage(args->isolate(), icon_value, &icon) ||
      icon->image().IsEmpty()) {
    return;
  }
   Start dragging.
  if (!files.empty()) {
    base::CurrentThread::ScopedNestableTaskAllower allow;
    DragFileItems(files, icon->image(), ontents()->GetNativeView());
  } else {
    gin_helper::ErrorThrower(args->isolate())
        .ThrowError("Must specify either 'file' or 'files' option");
  }
}
v8::Local<v8::Promise> WebContents::CapturePage(gin::Arguments* args) {