Hey Mike,
which k8s version and flavor are you using?
For example starting with k8s 1.22 there are some changes in APIs. Like CustomResourceDefinition is no longer v1beta1, but just v1.
And in some k8s flavors I see the note:
spec.preserveUnknownFields: true is disallowed when creating v1 CustomResourceDe.finition objects; it must be specified within schema definitions as x-kubernetespreserve-unknown-fields: true.
Could you please try to set all occurrences of x-kubernetes-preserve-unknown-fields: to false in crd.yaml?
Also we migrated to OpenAPI schema starting with 1.12, so it might be related. Please let me know how it goes.