❔ nested generic interface throws cast exception when added to list

internal interface IComponentUpdateHandler<T, H, C> where T : IComponentMetaclass where H : IComponentUpdate<T> where C : IComponentData<T>

public interface IComponentUpdate<C> where C : IComponentMetaclass
public interface IComponentData<C> where C : IComponentMetaclass

internal class InventoryModificationState_Handler : IComponentUpdateHandler<InventoryModificationState, InventoryModificationState.Update, InventoryModificationState.Data>

public class Update : IComponentUpdate<InventoryModificationState>
public class Data : IComponentData<InventoryModificationState>

public class InventoryModificationState : IComponentMetaclass, IComponentFactory

 private List<IComponentUpdateHandler<IComponentMetaclass, IComponentUpdate<IComponentMetaclass>, IComponentData<IComponentMetaclass>>> handler { get; set; }
 private ComponentUpdateManager()
 {
     handler = new List<IComponentUpdateHandler<IComponentMetaclass, IComponentUpdate<IComponentMetaclass>, IComponentData<IComponentMetaclass>>>
     {
         new InventoryModificationState_Handler(),
         new PlayerCraftingInteractionState_Handler()
     };
 }