diff --git a/packages/grpc-js/src/load-balancer-child-handler.ts b/packages/grpc-js/src/load-balancer-child-handler.ts
index 86f29e2d..595d411a 100644
--- a/packages/grpc-js/src/load-balancer-child-handler.ts
+++ b/packages/grpc-js/src/load-balancer-child-handler.ts
@@ -127,6 +127,7 @@ export class ChildLoadBalancerHandler implements LoadBalancer {
         childToUpdate = this.pendingChild;
       }
     }
+    this.latestConfig = lbConfig;
     childToUpdate.updateAddressList(addressList, lbConfig, attributes);
   }
   exitIdle(): void {