NEVPNManager saveToPreferencesWithCompletionHandler cause app restart

Does anybody faced with such problem?

When code run saveToPreferencesWithCompletionHandler app restarts by itself without crash, no errors in console.

NEVPNManager *manager = [NEVPNManager sharedManager];

    [manager loadFromPreferencesWithCompletionHandler:^(NSError * _Nullable error) {

        if (error) {
#if DEBUG
              NSLog(@"loadFromPreferencesWithCompletionHandler_error: %@", error.localizedDescription);
#endif
            return;
        }

        NSString *serverURL = [self vpnServerURLWithCountryItem:countryItem];
        NSData *passwordReference = [self persistentReferenceForSavedPassword:credentials.password
                            service:@"passwordReferenceIKeV2"
                            account:credentials.username];

        [KeychainManager save:@"passwordReferenceIKeV2" data:passwordReference];

        NEVPNProtocolIKEv2 *protocol = [[NEVPNProtocolIKEv2 alloc] init];
        protocol.username = credentials.username;
        protocol.passwordReference = passwordReference;
        protocol.serverAddress = serverURL;
        protocol.serverCertificateIssuerCommonName = @"letsencrypt";
        protocol.authenticationMethod = NEVPNIKEAuthenticationMethodNone;
        protocol.disconnectOnSleep = NO;
        protocol.useExtendedAuthentication = YES;
        protocol.IKESecurityAssociationParameters.encryptionAlgorithm = NEVPNIKEv2EncryptionAlgorithmAES256;
        protocol.IKESecurityAssociationParameters.integrityAlgorithm = NEVPNIKEv2IntegrityAlgorithmSHA256;
        protocol.IKESecurityAssociationParameters.diffieHellmanGroup = NEVPNIKEv2DiffieHellmanGroup14;
        protocol.IKESecurityAssociationParameters.lifetimeMinutes = 1440;
        
        protocol.childSecurityAssociationParameters.encryptionAlgorithm = NEVPNIKEv2EncryptionAlgorithmAES256;
        protocol.childSecurityAssociationParameters.integrityAlgorithm = NEVPNIKEv2IntegrityAlgorithmSHA256;
        protocol.childSecurityAssociationParameters.diffieHellmanGroup = NEVPNIKEv2DiffieHellmanGroup14;
        protocol.childSecurityAssociationParameters.lifetimeMinutes = 1440;

        protocol.remoteIdentifier = serverURL;
        
        [manager setProtocolConfiguration:protocol];
        [manager setLocalizedDescription:@"Tunnel Name"];
        manager.enabled = YES;
        
        [manager saveToPreferencesWithCompletionHandler:^(NSError * _Nullable saveError) {
            if (saveError) {
#if DEBUG
                NSLog(@"saveToPreferencesWithCompletionHandler: %@", saveError.localizedDescription);
#endif
                return;
            }
            
            if (completionHandler) {
                completionHandler(error);
            }
        }];
    }];