【ios】设置了多个registration_id,为何只有一个id收到了通知

{"registration_id":["1517bfd3f793a1bd7b2","121c83f7607fbd854da","190e35f7e01463d4caf","13165ffa4e5ca3f16b6","141fe1da9ef0ef33f06","1517bfd3f793a1c7938"]}

按道理是都能收到啊，我开几个ios设备，却只有一个有通知，通知都打开了