tkinter optionmenu first option vanishes

Question

A ttk optionmenu widget starts out with all of its values in the dropdown. Upon selecting any value, the first value in the list vanishes, never to reappear...

Does

Answer 1

just adding to the answers of the other guys, since they didn't work for me. I discovered that if you don't set the widget option in StringVar/IntVar, it doesn't show the standard value that's been set. It might seem silly but it took me a lot of time to figure this out. Hope it helps, see ya. Example:

master = tk.Tk()
var = tk.StringVar(master)
master.mainloop()