iconphoto() reverts to default icon

iconphoto() always reverts to default icon, while iconbitmap() don't

import tkinter as tk


import customtkinter as ctk


def main():
    # creates main window
    root = ctk.CTk()

    # create icon
    icon = tk.PhotoImage(file="icon.png")

    # setting app icon
    # root.iconbitmap()
    root.iconphoto(True, icon) # set as default icon

    root.mainloop()


if __name__ == "__main__":
    main()

without Line 15 root.iconbitmap() it will reverts to the default icon, while with it, the icon will change.
It's most likely coming from the ctk.CTk._iconbitmap_method_called that only reacts with iconbitmap() and not iconphoto()

Environment:
Windows 11
Python 3.14.5
customtkinter v5.2.2

Start with the ctk.CTk entry point and inspect how _iconbitmap_method_called affects window icon handling. Reproduce the provided example on Windows with iconphoto() but without iconbitmap(). Done means the PhotoImage remains the application icon without requiring iconbitmap().