[API-users] org.gbif.api.vocabulary.Rank.INFRAORDER marker

Hi, INFRAORDER of API Java librarie's vocabulary Rank, i.e. org.gbif.api.vocabulary.Rank.INFRAORDER, doesn't have the marker value, unlike other INFRA- Ranks. Is it what designed? There are API response records having INFRAORDER as its rank which results in null maerker value, unlike other ranks. If it is what intended, why? Regerds, James