Index: src/obj_subc.c
===================================================================
--- src/obj_subc.c	(revision 11949)
+++ src/obj_subc.c	(revision 11950)
@@ -571,6 +571,7 @@
 			/* copy within the same board */
 			memcpy(&dl->meta.bound, &sl->meta.bound, sizeof(sl->meta.bound));
 			dl->meta.bound.name = pcb_strdup(sl->meta.bound.name);
+			dl->comb = sl->comb;
 			if (dl->meta.bound.real != NULL)
 				pcb_layer_link_trees(dl, dl->meta.bound.real);
 		}