Loots system error

A couple of days ago my LoL client got this error "Unable to retrieve loot item data" whenever I first accessing the loot menu after starting up the client. All items that I have earned after the first error notification appeared were not displayed in my Loot. I filled in the "Report a bug" form and submitted it to OCE LoL. They still haven't replied to my form yet (I wonder if they ever reply to bug reports). Magically the error is now gone somehow but all the items that I earned during the bug above still disappear. What can I do?