random.sample() generating random results when using the same seed

I'm writing a card game in python 3 (version 3.8.2) and I want to choose a couple of cards from a deck of cards and give them to each of the players. For the sake of testing the code, I seed the random module by a fixed value. So I expect that each time I'm executing the code, the players would get the same cards. But apparently, things are still random.

I have a CardDeck class, which manages the card deck for each round of game. When constructed, it creates a random.Random() object for itself:

import random as rand

Class CardDeck:
    def __init__(self):
        // some code...
        self.__random = rand.Random(100)
        print(self.__random.randint(0,10)) //always prints 2
        // some other code...

There's also a grab_card() method in this class, which gives the players some cards from the remaining cards in the deck (And I know, it could have been implemented better):

def grab_card(self, k):
    cards = set()
    for _ in range(k):
        card = self.__random.sample(self.__cards.difference(set([self.__top_card])), 1)[0] # choose any card but the top card
        self.__cards.remove(card)
        cards.add(card)

    return cards

But each time I run the program, I see that cards are given to players randomly, although using the same seed every time. This is the first run:

And here's the second run:

I can also confirm this when I test grab_card() individually:

deck = CardDeck()
somecards = deck.grab_card(5) // grab 5 cards from the deck
print(somecards) // prints random results every time I run the test

What is wrong here? Why are things still happening randomly?