REPORT-66939

designer-form/src/main/java/com/fr/design/mainframe/FormDesigner.java

@@ -1318,7 +1318,14 @@ public class FormDesigner extends TargetComponent<Form> implements TreeSelection
         DraggingModel model = this.draggingModel;
         MouseEvent dragEvent = model.getCurrentDragEvent();
         XCreator hotspot = this.getComponentAt(dragEvent.getX(), dragEvent.getY());
-        return XCreatorUtils.getHotspotContainer(hotspot);
+        XLayoutContainer container = XCreatorUtils.getHotspotContainer(hotspot);
+        XLayoutContainer topLayout = container.getTopLayout();
+        // REPORT-66939 Tab比较特殊，它是又多个LayoutContainer组成，直接返回container会导致误判，需要先找到最上层topLayout，取其父layout才是正确结果
+        if (topLayout != null && container != topLayout) {
+            return (XLayoutContainer) topLayout.getParent();
+        } else {
+            return container;
+        }
     }
 
     /**