Websocket Send, receive and flow back to send

Hi,

So my flow has 2 websocket nodes. A is sending and B is receiving.
I am communicating continuously, I am able to send data to the A node,
and when the server replies, I am able to get the data at B node.

But, from B node, my flow does some processing, and then flow back to node A
but it does not work. Anybody knows why? Is this even a correct way to do it?

Thanks.