Whenever an N-4 monsters would appear it would not render, the error log message is

Attempted to draw RH_DF_BlackLeaper48794 without a resolved render tree.
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch5 (string)
Verse.Log:ErrorOnce (string,int)
Verse.PawnRenderTree:Draw (Verse.PawnDrawParms)
Verse.PawnRenderer:RenderPawnInternal (Verse.PawnDrawParms)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.PawnRenderer.RenderPawnAt_Patch5 (Verse.PawnRenderer,UnityEngine.Vector3,System.Nullable`1<Verse.Rot4>,bool)
Verse.PawnRenderer:DynamicDrawPhaseAt (Verse.DrawPhase,UnityEngine.Vector3,System.Nullable`1<Verse.Rot4>,bool)
Verse.Pawn:DynamicDrawPhaseAt (Verse.DrawPhase,UnityEngine.Vector3,bool)
Verse.Thing:DynamicDrawPhase (Verse.DrawPhase)
Verse.DynamicDrawManager:DrawDynamicThings ()
Verse.Map:MapUpdate ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Game.UpdatePlay_Patch3 (Verse.Game)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Root_Play.Update_Patch1 (Verse.Root_Play)