Plumiferos report:

Compositor. New ESC feature did not work Ok for groups

source/blender/blenkernel/intern/depsgraph.c

@@ -462,7 +462,7 @@ static void build_dag_object(DagForest *dag, DagNode *scenenode, Object *ob, int
 		}
 		/* exception case: parent is duplivert */
 		if(ob->type==OB_MBALL && (ob->parent->transflag & OB_DUPLIVERTS)) {
-			dag_add_relation(dag, node2, node,DAG_RL_DATA_DATA|DAG_RL_OB_OB);
+			dag_add_relation(dag, node2, node, DAG_RL_DATA_DATA|DAG_RL_OB_OB);
 		}
 		
 		addtoroot = 0;

source/blender/blenkernel/intern/node.c

@@ -1623,6 +1623,10 @@ static void composit_begin_exec(bNodeTree *ntree, int is_group)
 	bNodeSocket *sock;
 	
 	for(node= ntree->nodes.first; node; node= node->next) {
+		
+		/* initialize needed for groups */
+		node->exec= 0;	
+		
 		if(is_group==0) {
 			for(sock= node->outputs.first; sock; sock= sock->next) {
 				bNodeStack *ns= ntree->stack[0] + sock->stack_index;