Removing stateless from an NSG rule doesn't trigger a change

[augusto]

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Terraform Version and Provider Version

Terraform v1.1.5 on linux_amd64

• provider registry.terraform.io/hashicorp/oci v4.63.0

Affected Resource(s)

• oci_core_network_security_group_security_rule

Terraform Configuration Files

resource "oci_core_network_security_group" "webserver" {
  compartment_id = var.compartment_ocid
  vcn_id         = var.vnc_ocid

  display_name  = "Webserver"
  freeform_tags = { "app" = "webserver" }
}

resource "oci_core_network_security_group_security_rule" "http" {
  network_security_group_id = oci_core_network_security_group.webserver.id
  description               = "allow http"
  direction                 = "INGRESS"
  protocol                  = 6 
  source_type               = "CIDR_BLOCK"
  source                    = "0.0.0.0/0"
  # Removing the next line should modify the resource as the default is false
  stateless                 = true
  tcp_options {
    destination_port_range {
      max = 80
      min = 80
    }
  }
}

Expected Behavior

When an NSG rule has stateless = true and this attribute is removed from the tf file, the resource should be modified to have stateless = false as this is the documented default.

Actual Behavior

Removing the stateless attribute doesn't flag the resource to be updated.

Steps to Reproduce

• Take the example above and execute it (replace vcn and compartment ocid). A NSG with with a stateless rule will be created.
• Edit the file and remove/comment the line with stateless = true, and re-run terraform
• The NSG rule is not updated.

Important Factoids

• Running this from WSL2 (Ubuntu 20.04).