I am trying to perform online partial refund on Magento 2.2.0, but once I press on creditmemo button in invoice page, and first partial refund is performed, you cannot perform another partial refunds after first one, because credit memo button will not appear anymore.
I traced the issue, and found that there is is_used_for_refund column inside the invoice table, that is set to 1 and prevent other partial refunds from taking place,
I am asking is it possible to issue partial refunds multiple times in Magento2? if yes, how can I enable that?
