Io.rancher.lb_service.target not working

have io.rancher.lb_service.target set to only-local. I have two services

load balancer (rancher load balancer x1 container)

Nginx container x1

I have two hosts, host A and host B both with the same affinity label. If I shutdown host B, the nginx container isn’t accessible via the http load balancer from host A for at least a minute or two. I don’t understand why host A is being affected.