### 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

14.0.0 beta 9

### What operating system are you using?

macOS

### Operating System Version

macOS Catalina 10.15.7

### What arch are you using?

x64

### Last Known Working Electron version

14.0.0 beta 8

### Expected Behavior

`console.log(app.getPath('userData'))` in main.js in Fiddle should output something like `/Users/miburda/Library/Application Support/stereotyped-rub-drain-i2tik`

### Actual Behavior

`console.log(app.getPath('userData'))` in main.js in Fiddle outputs `/Users/miburda/Library/Application Support/Electron`

### Testcase Gist URL

_No response_

### Additional Information

Seems to be regressed by #29649. Happens both before and after `app.whenReady()`.
shell/browser/electron_browser_context.cc
registry->RegisterFilePathPref(prefs::kDownloadDefaultDirectory,
                                 download_dir);
  registry->RegisterDictionaryPref(prefs::kDevToolsFileSystemPaths);
  InspectableWebContents::RegisterPrefs(registry.get());
  MediaDeviceIDSalt::RegisterPrefs(registry.get());
  ZoomLevelDelegate::RegisterPrefs(registry.get());
  PrefProxyConfigTrackerImpl::RegisterPrefs(registry.get());
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
  if (!in_memory_)
    extensions::ExtensionPrefs::RegisterProfilePrefs(registry.get());
#endif
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
  BrowserContextDependencyManager::GetInstance()
      ->RegisterProfilePrefsForServices(registry.get());
  language::LanguagePrefs::RegisterProfilePrefs(registry.get());
#endif
  prefs_ = prefs_factory.Create(
      registry.get(),
      std::make_unique<PrefStoreDelegate>(weak_factory_.GetWeakPtr()));
  prefs_->UpdateCommandLinePrefStore(new ValueMapPrefStore);
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS) || \
    BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
  user_prefs::UserPrefs::Set(this, prefs_.get());
#endif
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
  auto* current_dictionaries =
      prefs()->Get(spellcheck::prefs::kSpellCheckDictionaries);
  
  if (current_dictionaries->GetList().empty()) {
    std::string default_code = spellcheck::GetCorrespondingSpellCheckLanguage(