Randomizing Sentences In Python

I not long ago finished my project which comments on a video based on a keyword on YouTube, it will pick a random comment using the random library. The program has been acting strange when "randomizing" the comments to add to the YouTube videos. I'm starting to think I may need to improve the randomness, the fact being that it has chosen the 4th comment (out of 9) 7 times, and the 9th one 3 times. Both of these results occur after each other, in other words, it is sending the same message in a row when it's meant to pick randomly and not repeat. Is there any way I can increase how random this is? If you know, please do tell me, I will appreciate it a bunch!

PS: This is more of stopping it from repeating the same sentence on YouTube.

code:

if __name__ == "__main__":
    from googleapiclient.errors import HttpError
    import random
    import time
    import sys
    
    # Comments are getting loaded
    comments = load_comments('Comments.txt')
    # Getting the number of comments you want to add
    number_of_comments = int(input('Enter the number of comments: '))
    count, cycle, videoid_store = 0, 1, []
    # Getting the keyword
    keyword = input('Enter the Keyword: ')
    
    
    # This loop keeps running until all comments have been added
    youtube = authentication()
    while count < number_of_comments:
        
        print("Searching for videos ..  (Cycle:%d)" %cycle)
        time.sleep(10)
        
        random.shuffle(comments)