I am trying to create an NS record for my hosted zone, dev.example.com. The name of the record should be dev-api.example.com. However, when applying the terraform to the dev environment, it shows up in AWS route53 as dev-api.example.com.dev.example.com for the record name. Why might this be happening? Below is the relevant code.

data "aws_route53_zone" "example_api" {
  name = var.environment == "prod" ? "api.example.com" : "dev-api.example.com"
}

data "aws_route53_zone" "example" {
  name         = var.environment == "prod" ? "example.com" : "dev.example.com"
  private_zone = false
}

resource "aws_route53_record" "example_api_ns" {
  zone_id = data.aws_route53_zone.example.zone_id
  name    = var.environment == "prod" ? "api.example.com" : "dev-api.example.com"
  type    = "NS"
  ttl     = 300

  records = [
    data.aws_route53_zone.example_api.name_servers[0],
    data.aws_route53_zone.example_api.name_servers[1],
    data.aws_route53_zone.example_api.name_servers[2],
    data.aws_route53_zone.example_api.name_servers[3],
  ]
}