The error I am receiving is the comparison is not working.

def switch_on_off(topic, message):
    print("Received message on topic: {}, message: {}".format(topic, message))
    message_str = message.decode()  # Convert bytes to string
    if message_str == 'on':
        print("Turning on the relay")
        relay_pin.value(0)  # Turn on the relay
    elif message_str == 'off':
        print("Turning off the relay")
        relay_pin.value(1)  # Turn off the relay
    else:
        print("Invalid message:", message_str)



def ai_posture(topic, message):
    
    print("Received message on topic: {}, message: {}".format(topic, message))
    message_str = message.decode()  # Convert bytes to string
    if message_str == 'Bad posture detected!':
        print("buzzer beeping")
        oled.text("Bad Posture Detected!", 0, 40)
        oled.show()
        buzzer_pin.value(1)
    elif message_str == 'Good posture detected!':
        print("buzzer off")
        buzzer_pin.value(0)
    else:
        print("Invalid message:", message_str)

I am randomly receiving able to get the correct message and get the light to turn off and on. Even if the message subscribed is the same. I am receiving the following message:

Invalid message: on
on
Invalid message: on
off
on
off
on