root.iconbitmap() forces tkinter to enter a temporary eventloop?

Does wm_iconbitmap method forces tkinter to enter an event loop while it processes the icon file? Is there a way to avoid this? Check this example that illustrates this:

from tkinter import *
import time

root = Tk()
root.iconbitmap('images/logo.ico') # Without `mainloop()` shows the window, means the events have started being processed?
time.sleep(3)

I couldn’t find any related info in the documentation either.
Thanks in advance 🙂

Edit: A little more research shows that root.iconbitmap() does not enter event loop, maybe because there is no icon to process/check? But that would not answer why root.iconphoto does not enter an event-loop when called