`custom_properties` do not update

[lughino]

Hi there,

I seem to have found a bug in the custom_properties field of the feature flags. Given a resource

resource "launchdarkly_feature_flag" "test_flag" {
  project_key = "default"
  key         = "test_flag"
  name        = "test_flag"
  temporary   = true
  client_side_availability {
    using_environment_id = true
    using_mobile_key     = false
  }

  variation_type = "boolean"
  variations {
    value = "true"
  }
  variations {
    value = "false"
  }

  defaults {
    on_variation  = 1
    off_variation = 1
  }

  custom_properties {
    key   = "jira.issues"
    name  = "Jira Issues"
    value = ["PROJ-43", "PROJ-51", "PROJ-52"]
  }
}

If I update the jira issues custom_properties, terraform does not pick up any changes. I tried to change/remove/add any value inside the value's list of strings but terraform seems not to recognise that that field has been updated.

Using LaunchDarkly provider version 2.18.0