diff --git a/source/blender/blenkernel/intern/attribute_access.cc b/source/blender/blenkernel/intern/attribute_access.cc
index 36818088520..cad4bffc984 100644
--- a/source/blender/blenkernel/intern/attribute_access.cc
+++ b/source/blender/blenkernel/intern/attribute_access.cc
@@ -1135,11 +1135,30 @@ void copy_attributes_group_to_group(const AttributeAccessor src_attributes,
       return;
     }
     const GVArraySpan src = *iter.get(src_domain);
+    const bool dst_already_exists = dst_attributes.contains(iter.name);
     GSpanAttributeWriter dst = dst_attributes.lookup_or_add_for_write_only_span(
         iter.name, dst_domain, iter.data_type);
     if (!dst) {
       return;
     }
+    if (!dst_already_exists) {
+      /* Skip filling with the default value if all of the data is going to be filled. */
+      if (!(dst_offsets.total_size() == dst.span.size() && selection.size() == dst_offsets.size()))
+      {
+        const CPPType &type = dst.span.type();
+        if (dst_attributes.is_builtin(iter.name)) {
+          if (const GPointer value = dst_attributes.get_builtin_default(iter.name)) {
+            type.fill_construct_n(value.get(), dst.span.data(), dst.span.size());
+          }
+          else {
+            type.fill_construct_n(type.default_value(), dst.span.data(), dst.span.size());
+          }
+        }
+        else {
+          type.fill_construct_n(type.default_value(), dst.span.data(), dst.span.size());
+        }
+      }
+    }
     array_utils::copy_group_to_group(src_offsets, dst_offsets, selection, src, dst.span);
     dst.finish();
   });
diff --git a/source/blender/editors/grease_pencil/intern/grease_pencil_join_selection.cc b/source/blender/editors/grease_pencil/intern/grease_pencil_join_selection.cc
index 8c94666ef1f..712bfb6b5ee 100644
--- a/source/blender/editors/grease_pencil/intern/grease_pencil_join_selection.cc
+++ b/source/blender/editors/grease_pencil/intern/grease_pencil_join_selection.cc
@@ -437,6 +437,7 @@ void remove_selected_points(Span<PointsRange> ranges_selected)
     IndexMaskMemory memory;
     const IndexMask combined_mask = IndexMask::from_union(item.value, memory);
     dst_curves.remove_points(combined_mask, {});
+    item.key->tag_topology_changed();
   }
 }