Missing documentation and bugs

{
    id: int  -> id of the song
    anime_id: int -> id of the corresponding anime
    text: str  -> description, usually in the format "title by author (episode range)"
}

    "statistics": {
        "status": {
            "watching": "176831",           # a json parser parses these as strings due to having ""
            "completed": "2937125",
            "on_hold": "45120",
            "dropped": "52247",
            "plan_to_watch": "152876"
        },
        "num_list_users": 3364199     # this is parsed correctly
    }

# fetching this url different times returns different results, these are the ones i found
# (some fileds are excluded for clarity)
'https://api.myanimelist.net/v2/manga?q=kanojo&offset=2&limit=2'

result1
{
    "node": {
        "id": 68521,
        "title": "Kin no Kanojo Gin no Kanojo"
    }
     "node": {
         "id": 96334,
         "title": "Kanojo to Kanojo no Neko"
       }
}

result 2
{
     "node": {
         "id": 96334,
         "title": "Kanojo to Kanojo no Neko"
       }
    "node": {
         "id": 88537,
         "title": "T-Rex na Kanojo"
       }
}

request at https://api.myanimelist.net/v2/manga/91941?fields=recommendations{num_favorites}

response (only relavant part)
"recommendations": [
        {
            "node": {
                "id": 100128,
                "title": "Yakusoku no Neverland",
                "main_picture": {
                    "medium": "https://api-cdn.myanimelist.net/images/manga/3/186922.jpg",
                    "large": "https://api-cdn.myanimelist.net/images/manga/3/186922l.jpg"
                },
                "num_favorites": 18908
            },
            "num_recommendations": 4
        },
        { .....
    ]