Found the Menu Editor has bug
When add new menu at menu editor, all the other menu is gone off. Please help solve
if we create the new menu as shown in screen shot, https://pasteboard.co/JSpaqtf.png , all the menu will be disappeared.
So what we can do to temporarily solve now is to create under sub menu https://pasteboard.co/JSpbaLd.png , and then move to main menu, then the whole menu will not disappeared.