Say you want to uninstall the helm chart, and you run a command like helm uninstall rasa-x-1586547433 It works, but the ingress servers get left behind, like this:
kubectl delete --cascade=true ingress rasa-x-1586547433 will hang, waiting for the dependant resource to get deleted.
The command kubectl patch ingress rasa-x-1586547433 -n rasa -p '{"metadata":{"finalizers":null}}' fixes the problem, and now the delete command returns successfully.
Hopefully, this post saves someone the time I spent yesterday figuring this out!