diff --git a/src/ip6-manager/nm-ip6-manager.c b/src/ip6-manager/nm-ip6-manager.c
index e452c18e25..3dc8616c32 100644
--- a/src/ip6-manager/nm-ip6-manager.c
+++ b/src/ip6-manager/nm-ip6-manager.c
@@ -921,6 +921,14 @@ process_route_change (NMIP6Manager *manager, struct nl_msg *msg)
 		return NULL;
 	}
 
+	/* Cached/cloned routes are created by the kernel for specific operations
+	 * and aren't part of the interface's permanent routing configuration.
+	 */
+	if (rtnl_route_get_flags (rtnlroute) & RTM_F_CLONED) {
+		rtnl_route_put (rtnlroute);
+		return NULL;
+	}
+
 	device = nm_ip6_manager_get_device (manager, rtnl_route_get_oif (rtnlroute));
 
 	old_size = nl_cache_nitems (priv->route_cache);