edit

app/shop/lib/Sell.php

@@ -350,7 +350,7 @@ class Sell
                 }
 
                 if ($v['discount_id'] && $v['discount_id'] > 0) {
-                    $info['discount_goods'] = $info['goods'];
+                    $info['discount_goods'][] = $info['goods'][$k];
                 }
             }