ASP.NET Web Api Swagger IEnumerable

Why is it not displayed correctly?

i used Swashbuckle v5.6.0

in Swagger UI I get a model like

Inline Model [
              Inline Model 1
            ]

Inline Model 1 { ID (integer, optional), WordingFR (string, optional), WordingNL (string, optional) }

for a REST Get method like:

     [HttpGet]
    [Route("GetCivilStatus")] // this route becomes [controller]/GetCivilStatus 

    [SwaggerResponse(HttpStatusCode.OK, Type = typeof(IEnumerable<CivilStatus>))]
   public List<CivilStatus> GetCivilStatus()
        {...}