We updated our Magento version a couple weeks ago to the 220.127.116.11 (CE) version. This week we tried to create some online refunds and it was not working. (I tried with multiple different orders, so I am pretty sure was not a specific situation).
I know that my payment gateway (Authorize.NET) accepts online refunds because we always worked with refunds using Magento. I contact them to see if anything has changed in their end but they said that there is no changes in the refund process.
I am not sure if this is related to the update that I made in the Magento version or if could be any other problem.
Any ideas on how to troubleshot this? Or any similar experiences? I have no clue on how to fix this...