Receive new message issue after upgrade to SDK chat v4

Sendbird Chat API/SDK JavaScript
1

Can not receive new messages after several mins since the first channel enter. I use sendbird v4 in a nuxt.js web project.

"@sendbird/chat": "4.0.11",
"nuxt": "2.15.8",

import SendbirdChat, {ConnectionHandler} from '@sendbird/chat'
import { OpenChannelModule, OpenChannelHandler } from '@sendbird/chat/openChannel';
import { v4 as uuid } from 'uuid';

const appId = process.env.SENDBIRD_APP_ID;

const params = {
    appId: appId,
    localCacheEnabled: false,
    modules: [
      new OpenChannelModule(),
    ]
}
export const sb = SendbirdChat.init(params);

export const connectionHandler = new ConnectionHandler();

export default {
  connect(userId, token) {
    return new Promise(async (resolve, reject) => {
      sb.connect(userId, token)
        .then((user) => {
          sb.addConnectionHandler(userId, connectionHandler);
          resolve(user);
        })
        .catch(error => { 
          reject(new Error(`Sendbird Login Failed: ${error.code} - ${error.message}`))
        });
    });
  },
  enterChannel(channelUrl, onMessageReceived, onMessageUpdated) {
    sb.openChannel.getChannel(channelUrl)
      .then(channel => {
        channel.enter()
          .then(() => {
            const openChannelHandler = new OpenChannelHandler({
              onMessageReceived: (channel, message) => { onMessageReceived(channel, message) },
              onMessageUpdated: (channel, message) => { onMessageUpdated(channel, message) },
            })
            
            sb.openChannel.addOpenChannelHandler(uuid(), openChannelHandler);
          })
          .catch(error => {
            console.error(`Could not enter channel ${channelUrl}: ${error.code} - ${error.message}`)
            return
          })
      })
      .catch(error => {
        console.error(`Could not get channel ${channelUrl}: ${error.code} - ${error.message}`)
        return
      })
  },
}