diff --git a/include/pcb_group.h b/include/pcb_group.h
index d4d55ec085..e389cd9b7b 100644
--- a/include/pcb_group.h
+++ b/include/pcb_group.h
@@ -124,6 +124,12 @@ public:
         wxFAIL_MSG( wxT( "groups don't support layer SetLayer" ) );
     }
 
+    bool IsOnCopperLayer() const override
+    {
+        // A group might have members on a copper layer, but isn't itself on any layer.
+        return false;
+    }
+
     /** Set layer for all items within the group.
      *
      * To avoid freezes with circular references, the maximum depth is 20 by default.
diff --git a/libs/kimath/include/geometry/shape_compound.h b/libs/kimath/include/geometry/shape_compound.h
index c4c333cb03..0e26bd70ed 100644
--- a/libs/kimath/include/geometry/shape_compound.h
+++ b/libs/kimath/include/geometry/shape_compound.h
@@ -81,7 +81,7 @@ public:
     void AddShape( SHAPE* aShape )
     {
         // Don't make clients deal with nested SHAPE_COMPOUNDs
-        if( aShape->HasIndexableSubshapes() )
+        if( dynamic_cast<SHAPE_COMPOUND*>( aShape ) )
         {
             std::vector<const SHAPE*> subshapes;
             aShape->GetIndexableSubshapes( subshapes );
@@ -102,7 +102,7 @@ public:
     void AddShape( std::shared_ptr<SHAPE> aShape )
     {
         // Don't make clients deal with nested SHAPE_COMPOUNDs
-        if( aShape->HasIndexableSubshapes() )
+        if( dynamic_cast<SHAPE_COMPOUND*>( aShape.get() ) )
         {
             std::vector<const SHAPE*> subshapes;
             aShape->GetIndexableSubshapes( subshapes );
@@ -125,7 +125,7 @@ public:
 
     int Size() const
     {
-        return m_shapes.size();
+        return (int) m_shapes.size();
     }
 
     void Rotate( const EDA_ANGLE& aAngle, const VECTOR2I& aCenter = { 0, 0 } ) override;
diff --git a/pcbnew/footprint.cpp b/pcbnew/footprint.cpp
index 7e320098df..13c7510f9a 100644
--- a/pcbnew/footprint.cpp
+++ b/pcbnew/footprint.cpp
@@ -2547,7 +2547,17 @@ void FOOTPRINT::CheckNetTies( const std::function<void( const BOARD_ITEM* aItem,
     for( BOARD_ITEM* item : m_drawings )
     {
         if( item->IsOnCopperLayer() )
+        {
             copperItems.push_back( item );
+        }
+        else if( PCB_GROUP* group = dynamic_cast<PCB_GROUP*>( item ) )
+        {
+            group->RunOnDescendants( [&]( BOARD_ITEM* descendent )
+                                     {
+                                         if( descendent->IsOnCopperLayer() )
+                                             copperItems.push_back( descendent );
+                                     } );
+        }
     }
 
     for( ZONE* zone : m_fp_zones )