Problem with jsonconstructor while deserializing a class

Hello, i am using JsonDotNetForUnity in my project and got into this trouble. I have some data, that need to be serialized, it is kinda complimentary to my gameobject, therefore it is a class, not monobehaviour. The classses are created, loaded into SortedList, then this list is serialized into json. Then we use this list through deserialization. There will be a lot of "strange code", i am sorry in advance, since this is not my first time dealing with this problem. So the class looks like this

 [JsonConverter(typeof(StringEnumConverter))]
     public enum BodyPartsGroup
     {
         Head=0, 
         Front=1,
         Back=2,
         LeftHand=3,
         RightHand=4,
         LeftLeg=5,
         RightLeg=6,
         None=7
     }
     [JsonConverter(typeof(StringEnumConverter))]
     public enum BodyParts
     {
         Forehead=0,
         Neck,
         Cheek,
         Nose,
         Chest,
         Belly,
         Back,
         LeftShoulder,
         RightShoulder,
         LeftForearm,
         RightForearm,
         LeftPalm,
         RightPalm,
         LeftFingers,
         RightFingers,
         LeftShin,
         RightShin,
         LeftThigh,
         RightThigh,
         LeftFoot,
         RightFoot,
         LeftHeel,
         RightHeel,
         LeftToes,
         RightToes,
         Any
     }
     [JsonObject(MemberSerialization.OptIn)]
     public class IllnessInfo
     {
         [JsonProperty]
         public LinkedList<IllnessStep> ListOfStepsToHeal { get; set; }
         [JsonProperty]
         public string Name { get; private set; }
         [JsonProperty]
         public string BodyPartName { get;  private set; }
         [JsonProperty]
         public string GroupOfBodyPartsName { get;  private set; }
         [JsonProperty]
         public List<string> IngridientsNeeded { get; set; }
         [JsonProperty]
         public int LevelOfIllness { get;  set; } = 1; 
         [JsonProperty]
         public int DaysToHeal { get; set; }
         
         [JsonConstructor]
         public IllnessInfo(string name, LinkedList<IllnessStep> listOfSteps,BodyParts bp,List<string> ingridients, int daysToHeal=1)
         {
             Name = name;
             ListOfStepsToHeal = listOfSteps;
             BodyPartName = bp.ToString();
             Debug.Log(bp);
             GroupOfBodyPartsName = GetBodyPartsGroupName(bp);
             IngridientsNeeded = ingridients;
             DaysToHeal = daysToHeal;
         }
 }

Serialization code looks in method looks like this

 private static SortedList<string, IllnessInfo> CreateIllnessesInfos()
             {
                 if (File.Exists(IllnessAddress))
                 {
                     Dictionary<string, IllnessInfo> dict;
                     using (StreamReader file = File.OpenText(IllnessAddress))
                     { 
                         JsonSerializer serializer = new JsonSerializer();
                        dict = (Dictionary<string, IllnessInfo>)serializer.Deserialize(file, typeof(Dictionary<string, IllnessInfo>));
                     }
                     return new SortedList<string, IllnessInfo>(dict);
                 }
                 var illnessInfoSortedList = new SortedList<string, IllnessInfo>(); 
 
 some code not really relevant here
 
                 var illinfo = new IllnessInfo("illness", listOfActionsToAdd, BodyParts.LeftFingers, listOfIngridients);
                 illnessInfoSortedList.Add(illinfo.Name, illinfo);
                 illinfo = new IllnessInfo("illness Variant", listOfActionsToAdd, BodyParts.RightFingers,
                     listOfIngridients);
                 illnessInfoSortedList.Add(illinfo.Name, illinfo);
                 illinfo = new IllnessInfo("illness Variant 1", listOfActionsToAdd, BodyParts.LeftForearm,
                     listOfIngridients);
                 illnessInfoSortedList.Add(illinfo.Name, illinfo);
                 using (StreamWriter sw = File.CreateText(IllnessAddress))
                 {
                     JsonSerializer serializer = new JsonSerializer();
                     var dct = new Dictionary<string, IllnessInfo>(illnessInfoSortedList);
                     serializer.Serialize(sw,dct);
                 }
                 return illnessInfoSortedList;
             }
 

Everything works, when i am not deserializing from json, when i am deserializing it .... kinda works. The Json constructor is invoked, but all the Properties are set to default. Like i passed Enum of Bodypart, passed LinkedList, after serialization the Bodypart is set to 0 (Forehead) and LinkedList is null. And this is where i am stuck, unforunatelly. I really cant understand, what seem to be problem here.