This code is to create a simple graphical quiz. The tkinter window always seems to crash when i press the multiple choice button on the substraction quiz. It doesnt crash on any other type of quiz. Sometimes it works when i click the multiple choice button only to crash further into the quiz.
Heres the code:

import tkinter as tk
import random

def main_menu():
    clear_window()
    root.configure(bg='DodgerBlue4')

    title = tk.Label(root, text="Math Quiz", font=("Arial", 32), bg='DodgerBlue4', fg='white')
    title.pack(pady=40)

    button_frame = tk.Frame(root, bg='DodgerBlue4')
    button_frame.pack(pady=20)

    operations = [
        ("Multiplication", lambda: select_quiz_type('Multiplication'), 'red'),
        ("Addition", lambda: select_quiz_type('Addition'), 'forest green'),
        ("Subtraction", lambda: select_quiz_type('Subtraction'), 'blue'),
        ("Division", lambda: select_quiz_type('Division'), 'gold'),
    ]

    for operation, command1, color in operations:
        if command1:
            tk.Button(button_frame, text=operation, font=("Arial", 18), command=command1, bg=color, fg='white', width=12).pack(side='left', padx=20)


def clear_window():
    for widget in root.winfo_children():
        widget.destroy()

def select_quiz_type(operation):
    clear_window()
    root.configure(bg='DodgerBlue4')

    label = tk.Label(root, text=f"{operation} Quiz Type", font=("Arial", 24), bg='DodgerBlue4', fg='white')
    label.pack(pady=20)

    button_frame = tk.Frame(root, bg='DodgerBlue4')
    button_frame.pack(pady=20)

    tk.Button(button_frame, text="Multiple Choice", font=("Arial", 18), command=lambda: start_quiz(operation, "multiple_choice"), bg='gold', fg='black').pack(side='left', padx=20)
    tk.Button(button_frame, text="Submit Box", font=("Arial", 18), command=lambda: start_quiz(operation, "submit_box"), bg='gold', fg='black').pack(side='left', padx=20)

def start_quiz(operation, quiz_type):
    if operation == "Multiplication":
        create_quiz("Multiplication", lambda: (random.randint(1, 12), random.randint(1, 12)), lambda x, y: x * y, quiz_type)
    elif operation == "Addition":
        create_quiz("Addition", lambda: (random.randint(0, 100), random.randint(0, 100)), lambda x, y: x + y, quiz_type)
    elif operation == "Subtraction":
        create_quiz("Subtraction", lambda: (random.randint(0, 100), random.randint(0, 100)), lambda x, y: x - y, quiz_type)
    elif operation == "Division":
        create_quiz("Division", lambda: (random.randint(1, 100), random.randint(1, 10)), lambda x, y: x // y if y != 0 else 1, quiz_type)

def create_quiz(title, question_generator, answer_function, quiz_type):
    global current_operation, quiz_questions, quiz_answers, current_question, score, question_label, answer_buttons, answer_entry, current_quiz_type
    clear_window()

    current_operation = title.split()[0]
    current_quiz_type = quiz_type

    tk.Label(root, text=f"{title} Quiz", font=("Arial", 24), bg='DodgerBlue4', fg='white').pack(pady=20)

    quiz_questions = []
    quiz_answers = []

    for _ in range(10):
        x, y = question_generator()
        quiz_questions.append((x, y))
        quiz_answers.append(answer_function(x, y))

    current_question = 0
    score = 0

    question_label = tk.Label(root, font=("Arial", 18), bg='DodgerBlue4', fg='white')
    question_label.pack(pady=20)

    if quiz_type == "multiple_choice":
        answer_buttons = []
        for i in range(4):
            btn = tk.Button(root, font=("Arial", 18), bg='gold', fg='black', command=lambda control=i: check_mp_ans(control))
            btn.pack(pady=5)
            answer_buttons.append(btn)
    else:
        answer_entry = tk.Entry(root, font=("Arial", 18))
        answer_entry.pack(pady=10)
        tk.Button(root, text="Submit", font=("Arial", 18), command=check_sb_ans, bg='gold', fg='black').pack(pady=20)

    update_question()

def update_question():
    global current_question, quiz_questions, question_label, quiz_answers, current_quiz_type, answer_buttons
    if current_question < len(quiz_questions):
        x, y = quiz_questions[current_question]
        symbol = 'x' if current_operation == 'Multiplication' else '+' if current_operation == 'Addition' else '-' if current_operation == 'Subtraction' else '/'
        question_label.config(text=f"Question {current_question + 1}: {x} {symbol} {y} = ?")

        if current_quiz_type == "multiple_choice":
            correct_answer = quiz_answers[current_question]
            choices = [correct_answer]
            while len(choices) < 4:
                choice = random.randint(correct_answer - 10, correct_answer + 10)
                if choice not in choices and choice >= 0:
                    choices.append(choice)
            random.shuffle(choices)
            for i, choice in enumerate(choices):
                answer_buttons[i].config(text=str(choice))
    else:
        show_results()

def check_mp_ans(control):
    global current_question, score, quiz_answers
    selected_answer = int(answer_buttons[control].cget('text'))
    correct_answer = quiz_answers[current_question]
    if selected_answer == correct_answer:
        score += 1
        result_text = "Correct!"
    else:
        result_text = f"Wrong! The correct answer was {correct_answer}."

    current_question += 1
    show_answer_result(result_text)

def check_sb_ans():
    global current_question, score, quiz_answers, answer_entry
    try:
        user_answer = int(answer_entry.get())
    except ValueError:
        user_answer = None
    correct_answer = quiz_answers[current_question]
    if user_answer == correct_answer:
        score += 1
        result_text = "Correct!"
    else:
        result_text = f"Wrong! The correct answer was {correct_answer}."

    current_question += 1
    answer_entry.delete(0, tk.END)
    show_answer_result(result_text)

def show_answer_result(result_text):
    clear_window()
    root.configure(bg='DodgerBlue4')

    tk.Label(root, text=result_text, font=("Arial", 24), bg='DodgerBlue4', fg='white').pack(pady=20)
    tk.Button(root, text="Next", font=("Arial", 18), command=recreate_question_interface, bg='gold', fg='black').pack(pady=20)

def recreate_question_interface():
    clear_window()
    global question_label, answer_buttons, answer_entry
    question_label = tk.Label(root, font=("Arial", 18), bg='DodgerBlue4', fg='white')
    question_label.pack(pady=20)
    if current_quiz_type == "multiple_choice":
        answer_buttons = []
        for i in range(4):
            btn = tk.Button(root, font=("Arial", 18), bg='gold', fg='black', command=lambda control=i: check_mp_ans(control))
            btn.pack(pady=5)
            answer_buttons.append(btn)
    else:
        answer_entry = tk.Entry(root, font=("Arial", 18))
        answer_entry.pack(pady=10)
        tk.Button(root, text="Submit", font=("Arial", 18), command=check_sb_ans, bg='gold', fg='black').pack(pady=20)
    update_question()

def show_results():
    global score, quiz_questions
    clear_window()
    root.configure(bg='DodgerBlue4')

    tk.Label(root, text="Quiz Complete!", font=("Arial", 24), bg='DodgerBlue4', fg='white').pack(pady=20)
    tk.Label(root, text=f"Your score: {score}/{len(quiz_questions)}", font=("Arial", 18), bg='DodgerBlue4', fg='white').pack(pady=10)
    tk.Button(root, text="Main Menu", font=("Arial", 18), command=main_menu, bg='gold', fg='black').pack(pady=20)

root = tk.Tk()
root.geometry("900x600")
main_menu()
root.mainloop()

I tried it on two devices and it didnt work there too. The button grays out and the tkinter window stops responding. Its weird because its only for that specific multiple choice substraction quiz