Port changes from 75e1300f1c4e9b0f4b9cb448631829ad2cc48094

Author: BeanCheeseBurrito

src/Flecs.NET/Core/FilterBuilder.cs

@@ -651,6 +651,8 @@ public ref FilterBuilder Expr(string expr)
             return ref this;
         }
 
+        // TODO: Evaluate whether this commit should be added? https://github.com/SanderMertens/flecs/commit/bea64d33a5941b7156a379fa3434bfa28ee82c16
+
         /// <summary>
         ///     Alternative form of Term().
         /// </summary>

src/Flecs.NET/Core/MetricBuilder.cs

@@ -66,7 +66,14 @@ public ref MetricBuilder Member(ulong entity)
         /// <returns></returns>
         public ref MetricBuilder Member(string name)
         {
-            return ref Member(new World(World).Lookup(name));
+            Entity m = Desc.id == 0
+                ? new World(World).Lookup(name)
+                : new Entity(World, ecs_get_typeid(World, Desc.id)).Lookup(name);
+
+            if (m == 0)
+                Ecs.Log.Err("member '%s' not found", name);
+
+            return ref Member(m);
         }
 
         /// <summary>