这可能是由于WebSocket连接过程中网络问题导致的。可以通过重新连接WebSocket来解决该问题。以下是一个示例代码，通过在应用程序中引用该代码来解决此问题。

import Observable from 'zen-observable';
import AWSAppSyncClient, { AUTH_TYPE } from 'aws-appsync';
import awsconfig from './aws-exports';

const client = new AWSAppSyncClient({
    url: awsconfig.aws_appsync_graphqlEndpoint,
    region: awsconfig.aws_appsync_region,
    auth: {
        type: AUTH_TYPE.API_KEY,
        apiKey: awsconfig.aws_appsync_apiKey,
    },
    // Enable offline support
    offlineConfig: {
        callback: (err, succ) => {
            if (err) {
                console.error('Unable to write to offline storage', err)
            } else {
                console.log('Successfully wrote to offline storage:', succ)
            }
        }
    },
    // Add retry on 401
    // Adding this function to make subscription getting reconnected on 401 received on server
    fetchPolicy: 'cache-and-network',
    onError: ({ networkError, operation, forward }) => {
        if (networkError.statusCode === 401) {
            const { operation: op, variables } = operation;
            op.query.definitions.forEach((definition) => {
                if (definition.kind === "OperationDefinition") {
                    const { selectionSet } = definition;
                    definition.selectionSet.selections.forEach((selection) => {
                        if (selection.name.value === "onUpdateFeed") {
                            const table = selection.selectionSet.selections[0].name.value;
                            client.hydrated().then((client) => {
                                // Retry with the new token
                                client.subscribe({
                                    query: operation.query,
                                    variables: variables,
                                    fetchPolicy: 'network-only'
                                });
                            })
                        }
                    })
                }
            })
        }
    },
});

const observable = Observable.create(observer => {
    const realtimeResults = client.subscribe({
        query: gql`subscription TestSubscription {
            onCreatePost {
                id
                title
                user {
                    id
                    name
                }
            }