use one single instance for all plugins

Pilz.Dalamud/NamePlate/INamePlateGui.cs

@@ -37,4 +37,7 @@ public interface INamePlateGui
     /// Requests that all nameplates should be redrawn on the following frame.
     /// </summary>
     void RequestRedraw();
+
+    private static NamePlateGui instance;
+    public static INamePlateGui Instance => instance ??= new ();
 }

Pilz.Dalamud/NamePlate/NamePlateGui.cs

@@ -41,7 +41,7 @@ public sealed class NamePlateGui : IDisposable, INamePlateGui
 
     private NamePlateUpdateHandler[] updateHandlers = [];
 
-    public NamePlateGui()
+    internal NamePlateGui()
     {
         this.addonLifecycle.RegisterListener(AddonEvent.PreRequestedUpdate, "NamePlate", this.OnPreRequestedUpdate);
     }