could not get a field value by reflection getter... nhibernate query cache with 2nd level cache

with this inner exception:

Field '<>k__BackingField' defined on type is not a field on the target object which is of type 'System.Object[]'.

The problem exists only when i use eagerloading in query. Below i put my classes, relations and query.

public class DictionaryMaster
    {
        public virtual IList<DictionaryItem> DictionaryItems { get; private set; }
        public virtual System.String Code { get; private set; }
        public virtual System.String Description { get; private set; }
    }

   public class DictionaryMasterMap : ClassMap<DictionaryMaster>
    {
        public DictionaryMasterMap()
        {
            Cache.ReadOnly().Region("dictionary");
            LazyLoad();

            Id(x => x.Code) //i know this is so ugly
                .Column("DC_Code")
                .GeneratedBy.Assigned(); 
            Map(x => x.Description).Column("DC_Desc");
            HasMany(x => x.DictionaryItems)
                .Cascade.AllDeleteOrphan()
                .Fetch.Select()
                .AsBag()
                .Inverse()
                .Not.LazyLoad()
                .KeyColumns.Add("DI_DCCode");
        }
    }

 public class DictionaryItem
    {
        public virtual int Id { get; private set; }
        public virtual string Code { get; private set; }
        public virtual DictionaryMaster DictionaryMaster { get; private set; }
        public virtual string Description { get; private set; }
}

   public class DictionaryItemMap : Clas开发者_JAVA技巧sMap<DictionaryItem>
    {
        public DictionaryItemMap()
        {
            Cache.ReadOnly().Region("dictionary");

            Id(x => x.Id)
                .Column("DI_Id").GeneratedBy.Identity();

            Map(x => x.Code).Column("DI_Code");
            Map(x => x.Description).Column("DI_Desc");
            References(x => x.DictionaryMaster).Column("DI_DCCode");
        }
    }

Query: