Hello
if I create a custom field and choose to show it in all three layouts (Checkout billing address layout, Checkout shipping address layout and Checkout payment method layout), it is shown in all three layouts only when I register a new account. On the other hand, if I am already registered and login, the custom field is shown only in the Checkout payment method layout.
This way for example if I create an annotation field where the customer can add note to the order along with the address, when they place a new order this will not be visible/available. Why?
I tested it with a text area and a customtext custom fields.