fix: prune duplicate entity results from quad tree

packages/entity/traits/listed.js

@@ -101,9 +101,18 @@ export class Listed extends Trait {
         const quadTree = this.entity.list.quadTree();
         position = Vector.add(position, Vector.scale(size, -0.5));
         const query = Rectangle.compose(position, size);
-        return quadTree.search(query).map((node) => {
+        const entities = quadTree.search(query).map((node) => {
           return node.data[2];
         });
+        // Hitting multiple points for each entity can return duplicates.
+        const uniqueEntities = new Map();
+        entities.forEach((entity) => {
+          if (uniqueEntities.has(entity)) {
+            return;
+          }
+          uniqueEntities.set(entity, true);
+        })
+        return Array.from(uniqueEntities.keys());
       },
 
       resetQuadTreeNodes: () => {