Azure Disk Encryption using terraform VM extension - forces replacement [Second run]

I created the following resource to encrypt 'All' disk of a VM, and it worked fine so far:

resource "azurerm_virtual_machine_extension" "vm_encry_win" {
  count                         = "${var.vm_encry_os_type == "Windows" ? 1 : 0}"
  name                          = "${var.vm_encry_name}"
  location                      = "${var.vm_encry_location}"
  resource_group_name           = "${var.vm_encry_rg_name}"
  virtual_machine_name          = "${var.vm_encry_vm_name}"
  publisher                     = "${var.vm_encry_publisher}"
  type                          = "${var.vm_encry_type}"
  type_handler_version          = "${var.vm_encry_type_handler_version == "" ? "2.2" : var.vm_encry_type_handler_version}"
  auto_upgrade_minor_version    = "${var.vm_encry_auto_upgrade_minor_version}"
  tags                          = "${var.vm_encry_tags}"

  settings = <<SETTINGS
                {
                    "EncryptionOperation":      "${var.vm_encry_operation}",
                    "KeyVaultURL":              "${var.vm_encry_kv_vault_uri}",
                    "KeyVaultResourceId":       "${var.vm_encry_kv_vault_id}",
                    "KeyEncryptionKeyURL":      "${var.vm_encry_kv_key_url}",
                    "KekVaultResourceId":       "${var.vm_encry_kv_vault_id}",
                    "KeyEncryptionAlgorithm":   "${var.vm_encry_key_algorithm}",
                    "VolumeType":               "${var.vm_encry_volume_type}"
                }
             SETTINGS
}

When i ran the first time - ADE encryption is done for both OS and data disk. However, When I re-run terraform using terraform plan or terraform apply, it wants to replace all my data disks I have already created, like the following screenshot illustrates.

I do not know how to solve it. And my already created disks should not be replaced. I check on the lines of ignore_chnages

lifecycle {
        ignore_changes = [encryption_settings]
    }

I am not sure where to add or does this reference actually solves the problem? Which resource block should i add them. Or is there another way ?