(This may be true for all Refunds, don't know). Mine is re: Partial Shipping Refunds, as of Sept. 8.
When you "Preview Refund", the page hangs up, goes blank. You may think the Refund didn't go thru. DO NOT issue it again. First, check the Invoice. In my case, when the page hung up, I Redisplayed Page (F5). Checked the Invoice, and the Refund did go thru. This did not start happening until Sept. 8. *(desktop computer, Chrome, Windows 10)
Hope this helps someone.
