Is PaymentIntentsFutureUsage.OffSession suppose to work for single invoices?

[nerder]

Hello folks,

I'm using this setting while creating a subscription and everything seems to work as expected, the default payment method is attached to the customer after the successful payment.

Now I'm trying to do the support for one-off invoices and I would like to keep the same behavior but the payment method is not been attached to the customer.

What am I missing here?