JS Client Azure Web PubSub - Messages are getting send after delay of 80-85seconds

Question

I am using the Pub-Sub service to send/receive messages between client and server.
using JS version on client as well as server

Client

"@azure/web-pubsub-client": "^1.0.0-beta.3",

Server

"@azure/web-pubsub": "^1.1.1",
"@azure/web-pubsub-express": "^1.0.4",

Once I create client and start sending message to group OR send message to server, it works well.
I have configured URL in Resource so that I am able to receive custom messages to my middleware.

The moment I send message to server using

await client.sendEvent('message', 'Client is ready', 'text', {fireAndForget: true});

and after that if I send any message to group, it takes approx 80-85 seconds to receive other group members.
No console error on client side or server side.
But on LiveTraceTool, I can see one exception.

{"time":"2023-06-14T07:30:54.7972607Z","logLevel":"Warning","eventName":"HttpInvocationFailed","message":"Failed invoking 'https://5dd1b8bbaa56.ngrok.app/eventhandler?hub=captionmeeting&event=x' for 'hub:captionmeeting,event:message,type:user,category:messages,requestType:UserEvent'.","exception":"The request was canceled due to the configured HttpClient.Timeout of 100 seconds elapsing."}

Any idea about this particular error?
Once I receive this error on tool, after that it works smoothly and no problem occurs afterwards.
Is there anything which I am missing ?

Middleware code (using express library)

let handler = new WebPubSubEventHandler(HUB_NAME, {   
path: '/eventhandler', // Exposes an endpoint    
onConnected: async (req) => {     
	console.log(`${req.context.userId} connected`);   	
	},      
onDisconnected: async (req) => { 
   	console.log(req)   	
	},     
// This handler function will handle user system     
handleUserEvent: async (req, res) => {  
       if (req.context.eventName === "message") { 
      		console.log(`Received message: ${req.data}`);      	
	}   
}   
})

Region hosted: Germany West Central
Hub setting

Any help will be appreciated!
Thanks

Answer 1

Please call res.success in your handleUserEvent to write the response back to the service.

handleUserEvent: async (req, res) => {  
       if (req.context.eventName === "message") { 
      		console.log(`Received message: ${req.data}`);      	
	}
    res.success();   
 }