Permadiff in datadog_logs_index when daily_limit_reset is unset

[Zhann]

Datadog Terraform Provider Version

v3.36.0

Terraform Version

v1.5.7

What resources or data sources are affected?

datadog_logs_index

Terraform Configuration Files

resource "datadog_logs_index" "main" {
  for_each = local.datadog_log_indexes

  name           = each.key
  daily_limit    = each.value.daily_limit * 1000 * 1000
  retention_days = 15

  filter {
    query = each.value.filter
  }

  dynamic "exclusion_filter" {
    for_each = each.value["exclusion_filters"]

    content {
      is_enabled = exclusion_filter.value["is_enabled"]
      name       = exclusion_filter.value["name"]

      filter {
        query       = exclusion_filter.value["filter"]["query"]
        sample_rate = exclusion_filter.value["filter"]["sample_rate"]
      }
    }
  }
}

Relevant debug or panic output

No response

Expected Behavior

Resource is idempotent.

Actual Behavior

Permadiff:

  # datadog_logs_index.main["application"] will be updated in-place
  ~ resource "datadog_logs_index" "main" {
        id                                       = "application"
        name                                     = "application"
        # (4 unchanged attributes hidden)

      - daily_limit_reset {
          - reset_time       = "14:00" -> null
          - reset_utc_offset = "+00:00" -> null
        }

        # (16 unchanged blocks hidden)
    }

  # datadog_logs_index.main["infrastructure"] will be updated in-place
  ~ resource "datadog_logs_index" "main" {
        id                                       = "infrastructure"
        name                                     = "infrastructure"
        # (4 unchanged attributes hidden)

      - daily_limit_reset {
          - reset_time       = "14:00" -> null
          - reset_utc_offset = "+00:00" -> null
        }

        # (10 unchanged blocks hidden)
    }

Note this only happens on resources with daily_limit set.

Steps to Reproduce

terraform plan
# witness diff
terraform apply
terraform plan
# witness diff is still there

### Important Factoids

_No response_

### References

https://github.com/DataDog/terraform-provider-datadog/pull/2263