Runtime node creation miss to set comment status property

Repeatable:
Always

Steps to repeat:

1. configure a content type with comment open
2. create a new node of previous defined type via code or devel generate

To create a node via code:

  $edit_node = array(
    'nid' => NULL,
    'type' => 'article',
    'title' => 'Prova',
    'uid' => 1,
    'revision' => 1,
    'status' => TRUE,
    'promote' => 0,
    'created' => REQUEST_TIME,
    'langcode' => LANGUAGE_NOT_SPECIFIED,
  );

  $node = entity_create('node', $edit_node);
  $node->save();

Expected Results:
Comment for node is open.
$node->comment = COMMENT_NODE_OPEN;

Actual Results:
Comment status property is missing.
$node->comment = undefined;