gitlab_project_approval_rule modification completes but no changes are made

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GitLab Provider version

3.11.1

GitLab version

Latest SaaS

Terraform version

1.0.5

Relevant Terraform Configuration

resource "gitlab_project" "example" {
  name        = "example"
  visibility_level = "private"
}

resource "gitlab_project_approval_rule" "example-one" {
  project            = 5
  name               = "Example Rule"
  approvals_required = 1
  user_ids           = [50, 500]
}

Relevant log output

Note: Objects have changed outside of Terraform
Terraform detected the following changes made outside of Terraform since the
last "terraform apply":
  # module.gitlab_project_example_1.gitlab_project_approval_rule.example has been changed
  ~ resource "gitlab_project_approval_rule" "example" {
      ~ group_ids            = [
          - <redacted>,
          - <redacted>,
        ]
        id                   = "<redacted>"
        name                 = "test1"
        # (4 unchanged attributes hidden)
    }
  # module.gitlab_project_example_2.gitlab_project_approval_rule.example has been changed
  ~ resource "gitlab_project_approval_rule" "example" {
      ~ group_ids            = [
          - <redacted>,
          - <redacted>,
        ]
        id                   = "<redacted>"
        name                 = "test2"
        # (4 unchanged attributes hidden)
    }
Unless you have made equivalent changes to your configuration, or ignored the
relevant attributes using ignore_changes, the following plan may include
actions to undo or respond to these changes.
─────────────────────────────────────────────────────────────────────────────
Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
  ~ update in-place
Terraform will perform the following actions:
  # module.gitlab_project_example_1.gitlab_project_approval_rule.example will be updated in-place
  ~ resource "gitlab_project_approval_rule" "example" {
      ~ group_ids            = [
          + <redacted>,
          + <redacted>,
        ]
        id                   = "<redacted>"
        name                 = "test1"
        # (4 unchanged attributes hidden)
    }
  # module.gitlab_project_example_2.gitlab_project_approval_rule.example will be updated in-place
  ~ resource "gitlab_project_approval_rule" "approval_rule" {
      ~ group_ids            = [
          + <redacted>,
          + <redacted>,
        ]
        id                   = "<redacted>"
        name                 = "test2"
        # (4 unchanged attributes hidden)
    }
Plan: 0 to add, 2 to change, 0 to destroy.
module.gitlab_project_example_1.gitlab_project_approval_rule.example: Modifying... [id=<redacted>]
module.gitlab_project_example_2.gitlab_project_approval_rule.example: Modifying... [id=<redacted>]
module.gitlab_project_example_1.gitlab_project_approval_rule.example: Modifications complete after 1s [id=<redacted>]
module.gitlab_project_example_2.gitlab_project_approval_rule.example: Modifications complete after 0s [id=<redacted>]
Apply complete! Resources: 0 added, 2 changed, 0 destroyed.

Description

modify approval_rule resource to add group_ids = [<example_group_id_number_1>, <example_group_id_number_2>].

Run of plan should complete successfully and show rule in place modification to add the groups.

Apply will run successfully and log output shows modifications completed successfully.

Manual observation of the resource in Gitlab UI shows no change and subsequent plans and applys show modifications again.

Changes outside of Terraform show group_ids were removed.