After following instructions for Access a Synced Realm While Offline, it seems Realm is still trying to connect when my app launches and then hanging indefinitely on either a blank screen or a provided fallback view.

I have two schemas in my realm. One is configured for asymmetric sync (one way) and the other for flexible sync (two way).

When the app has a network connection, the sync service works as expected. It’s offline app launch that is crashing.

I’ve followed suggestions in similar questions linked below with no success:

mongoDB Forums

stack overflow

What I’ve tried:

1. Wipe app data
2. Launch app with network connection and login
3. Close the app and re-open offline

Expectation: the app launches normally using the cached user and the local realm.

Result: The app hangs indefinitely on the fallback component provided in the sync configuration. Network errors appear in the console.

I’ve tried the code below with and without the initialSubscriptions configuration.

I’ve also tried the Access After Timeout with Background Sync configuration.

Of note: the console.log message in the sync onError block never fires.

Any ideas or suggestions would be super appreaciated!

"expo": "~48.0.21",
"react": "18.2.0",
"realm": "^12.11.1",
"@realm/react": "^0.8.0",

const RealmWrapper = ({children}) => {

    const [syncError, setSyncError] = useState(null);
    const realmAccessBehavior = {
        type: OpenRealmBehaviorType.OpenImmediately,
    };

    return (
        <AppProvider id={APP_ID} logLevel={'trace'} logger={(level, message) => console.log(`[${level}]: ${message}`)}>
            <UserProvider fallback={LoginWrapper}>
                <RealmProvider
                    schema={[SurveyResults, SurveyDesign]}
                    fallback={<RealmLoading />}
                    sync={{
                        flexible: true,
                        existingRealmBehavior: realmAccessBehavior,
                        newRealmFileBehavior: realmAccessBehavior,
                        
                        onError: (_, error) => {
                            console.log("I'm In the sync error handler!");
                            setSyncError(error);               
                        },

                        initialSubscriptions: {
                            update(subs, realm) {
                            subs.add(realm.objects(SurveyDesign).filtered("name != nil"), {
                                name: "All Survey Designs",
                                behavior: WaitForSync.Never,
                            });
                            },
                        },
                    }}
                >
                    {children}
                </RealmProvider>
            </UserProvider>
        </AppProvider>

    );
}```

ERROR [Realm.Sync.Client.Network – error] Failed to resolve ‘ws.services.cloud.mongodb.com:443’: Host not found (authoritative)

ERROR [Realm.App – error] App: request location failed (CustomError -1): request to https://…../location failed, reason: Network request failed

ERROR [Realm.App – error] App: refresh_access_token: …… -> 0 ERROR: request to https://……/location failed, reason: Network request failed