So, my Match History refuses to update...

This doesn't really have any effect on gameplay or performance, so it may not be considered major issue; however, as of March 28, my match history simply refuses to update and I cannot find the cause of this malfunction. OP.GG seems to be able to at least confirm that the five games I've played since the 27th did exist, though I cannot access any additional info on them (team KDAs, gold, etc). All of the obvious things such as restarting the client, checking for viruses and the like has been covered, short of re-installing LoL entirely.

Any instruction or advice on this matter would be appreciated. Thank you in advance.