Failed prop type: Invalid prop children of type boolean supplied to ForwardRef(Snackbar)

[magnattic]

What you were expecting:
No errors in the console.

What happened instead:
The following error appears, when I save one of my Edit views (which triggers a default "Element updated" notification):

Warning: Failed prop type: Invalid prop `children` of type `boolean` supplied to `ForwardRef(Snackbar)`, expected a single ReactElement.
    at Snackbar (static/js/bundle.js:130817:82)
    at static/js/bundle.js:54696:66
    at Notification (static/js/bundle.js:235317:25)
    at div
    at static/js/bundle.js:54696:66
    at ScopedCssBaseline (static/js/bundle.js:129248:82)
    at AdminUI (static/js/bundle.js:222060:25)
    at App (static/js/bundle.js:128:105)
    at div
    at ThemeRegion (static/js/bundle.js:174155:5)
    at InnerThemeProvider (static/js/bundle.js:141150:70)
    at ThemeProvider (static/js/bundle.js:140058:5)
    at ThemeProvider (static/js/bundle.js:141169:5)
    at ThemeProvider (static/js/bundle.js:235879:21)
    at ResourceDefinitionContextProvider (static/js/bundle.js:211977:15)
    at NotificationContextProvider (static/js/bundle.js:219498:21)
    at I18nContextProvider (static/js/bundle.js:218616:15)
    at Router (static/js/bundle.js:274885:15)
    at HistoryRouter (static/js/bundle.js:220057:21)
    at InternalRouter (static/js/bundle.js:219971:21)
    at BasenameContextProvider (static/js/bundle.js:220026:21)
    at AdminRouter (static/js/bundle.js:219953:20)
    at QueryClientProvider (static/js/bundle.js:272148:21)
    at PreferencesEditorContextProvider (static/js/bundle.js:219706:21)
    at StoreContextProvider (static/js/bundle.js:220424:18)
    at CoreAdminContext (static/js/bundle.js:211505:28)
    at AdminContext (static/js/bundle.js:222002:18)
    at AbilityProvider (static/js/bundle.js:18502:5)
    at ApolloProvider (static/js/bundle.js:349720:19)
    at ThemeProvider (static/js/bundle.js:54726:64)
    at MantineProvider (static/js/bundle.js:100923:5)
    at AppContainer (static/js/bundle.js:430:62)

Steps to reproduce:
Since it's a non public repo I cannot share the code, but I am not doing anything crazy here.
I assume it has to do with the newer versions of @mui, where Snackbar does not accept boolean as children anymore.
But here it looks like Notification will pass false to the Snackbar sometimes:
https://github.com/marmelab/react-admin/blob/master/packages/ra-ui-materialui/src/layout/Notification.tsx#L120

Environment

• React-admin version: 4.8.0
• Material UI version: 5.11.9
• Last version that did not exhibit the issue (if applicable): ?
• React version: 18.2.0
• Browser: chrome

[djhi]

Thanks for the report!