[Python] Tkinter dropdown opens on top left of my screen

I have this simple tkinter script. But when I test it, the dropdown doesn't open below the combobox, but on the top left of my monitor (not top left of the application window). Any ideas why? I didn't really find anything on the internet. I use Python 3.13 on Windows 11.

from tkinter import *
from tkinter import ttk

root = Tk()
root.geometry("200x200")

def show():
lbl.config(text=cb.get())

# Dropdown options
a = ["Apple", "Banana", "Cherry", "Date", "Elderberry"]

# Combobox
cb = ttk.Combobox(root, values=a)
cb.set("Select a fruit")
cb.pack()

# Button to display selection
Button(root, text="Show Selection", command=show).pack()

# Label to show selected value
lbl = Label(root, text=" ")
lbl.pack()

root.mainloop()


Screenshot of the problem

EDIT: OptionMenu works fine, it opens below the OptionMenuButton. But I need this Multiple Selection Dropdown from Combobox :/

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