azurerm application_gateway is planning to add UserAssigned Managed Identity on every plan, even though it is already in the state

[darlinoo]

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Terraform Version

1.2.4

AzureRM Provider Version

2.96.0

Affected Resource(s)/Data Source(s)

azurerm_application_gateway

Terraform Configuration Files

resource "azurerm_resource_group" "rg" {
  name     = "rg-name}"
  location = var.location
}

resource "azurerm_user_assigned_identity" "id" {
  name                = "id-name"
  resource_group_name = azurerm_resource_group.rg.name
  location            = var.location
}

resource "azurerm_application_gateway" "application_gateway" {
  name                = "agw-name"
  resource_group_name = azurerm_resource_group.rg.name
  location            = var.location

  identity {
    type         = "UserAssigned"
    identity_ids = [azurerm_user_assigned_identity.id.id]
  }

Debug Output/Panic Output

# module.application_gateway.azurerm_application_gateway.application_gateway will be updated in-place
  ~ resource "azurerm_application_gateway" "application_gateway" {

      + identity {
          + identity_ids = [
              + "/subscriptions/xxxxxxxxxxxxxx/resourceGroups/xxxxxxxxxxxxxxxxx/providers/Microsoft.ManagedIdentity/userAssignedIdentities/xxxxxxxxxx",
            ]
          + type         = "UserAssigned"
        }

Expected Behaviour

Once the Configuration is applied and you plan again Terraform should say: No changes. Your infrastructure matches the configuration

Actual Behaviour

Terraform says it needs to add the identity as seen above in the Debug Output

Steps to Reproduce

1. terraform apply
2. terraform plan

Important Factoids

No response

References

No response