Request going to single node of emqx cluster even after using NGINX load blancer

Hello team,
we are facing issues in emqx cluster were the request is serveing to single node from cluster even after using load balancer.
due to this issue when this node goes out of the cluster the request is getting stucked and not serving to other nodes.

EMQX BROKER VERSION IS :- 4.3.5

Need more configuration information