After apply the haproxy.router.openshift.io/ip_whitelist annotation the route stops working on OpenShift 4

Issue

• After adding or changing the haproxy.router.openshift.io/ip_whitelist annotation with a high number of IPs and/or CIDRs (more than 61) in a single route, the route stops working returning Application not available 503 Service Unavailable
• After the haproxy.router.openshift.io/ip_whitelist annotation change in a route, even already created routes (also in other namespaces) will stop working after any changes, for example redeploying a pod
• The router pods are logging:

E0125 15:11:34.715929       1 limiter.go:165] error executing template for file /var/lib/haproxy/conf/haproxy.config: template: haproxy-config.template:398:73: executing "conf/haproxy.config" at <$cfgIdx>: wrong type for value; expected string; got templaterouter.ServiceAliasConfigKey