Making command card, I faced with a bug. I have tried to add submenu, but every time i do it, the value doesn't save. Every time i close and then open the command card, the field is empty.
So I had looked for decision in this site and found only one advice: the total overhaul of command card. I have tried this one and the result is the same: despite I returned command card to parents data, the field is still empty after closing.