I send you a video to make it clearer.
As you can see, the user start an order and adds two items to the order, then complete the order. If I exit the app and enter again, I start a new order, but in the menu the quantities in the counter are the ones of the previous order. How can I make them to be 0 again?
The database and relationships between collections is exactly the same than in this other post: Item quantity count - #9 by projectlinuxsupports
If you need an exact screenshot for anything in particular, I can send it to you. Than you in advance!