Terraform plans to update a resource that is not updateable

Hello. I have created an issue for the newrelic provider on their issue tracker.

The behavior is that under some circumstances, the terraform plan shows a plan to update newrelic resources which do not provide an Update function in the resource configuration. An attempt to apply these plans fails because the resource does not support update. The custom provider documentation states that the update function is not required.

I am wondering if I should have filed this issue as a terraform core bug because the provider communicates with core that it does not support update, so core should not plan to update the resource.

Should I cross post the issue to core bugs or wait and see if the newrelic community knows how to fix it?

this has been confirmed to be a provider issue.