KubernetesCRD/Ingress providers during kube-apiserver downtime?

How does the traefik kubernetesCRD, kubernetesIngress providers handle a a temporary kube-apiserver downtime?

Sometimes the kube API will have downtime, due to various issues, or upgrades.

Does the config (ingresses, TLSStore, middlewares) provided by those providers keep working when the API is down, so that the site most likely will stay up.

And if it does keep that config cached internally, for how long? Is there a time limit?