### 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

13.1.2

### What operating system are you using?

macOS

### Operating System Version

macOS Big Sur 11.4

### What arch are you using?

x64

### Last Known Working Electron version

11.4.5

### Expected Behavior

  - create the main window with `show: false` option
  - create the child window with a loading spinner and show it immediately
  - after 10 sec hide the child window and show the main one

### Actual Behavior

The main window is shown along with the child window, disregarding the `show: false` flag. This behavior is seen only on macOS.

### Testcase Gist URL

https://gist.github.com/f2a3a5e8d9130223f18b8ddade390f20

### Additional Information

_No response_
shell/browser/api/electron_api_base_window.cc
window_->SetOpacity(opacity);
}
double BaseWindow::GetOpacity() {
  return window_->GetOpacity();
}
void BaseWindow::SetShape(const std::vector<gfx::Rect>& rects) {
  window_->widget()->SetShape(std::make_unique<std::vector<gfx::Rect>>(rects));
}
void BaseWindow::SetRepresentedFilename(const std::string& filename) {
  window_->SetRepresentedFilename(filename);
}
std::string BaseWindow::GetRepresentedFilename() {
  return window_->GetRepresentedFilename();
}
void BaseWindow::SetDocumentEdited(bool edited) {
  window_->SetDocumentEdited(edited);
}
bool BaseWindow::IsDocumentEdited() {
  return window_->IsDocumentEdited();
}
void BaseWindow::SetIgnoreMouseEvents(bool ignore,
                                      gin_helper::Arguments* args) {
  gin_helper::Dictionary options;
  bool forward = false;
  args->GetNext(&options) && options.Get("forward", &forward);
  return window_->SetIgnoreMouseEvents(ignore, forward);
}
void BaseWindow::SetContentProtection(bool enable) {