Masteries Issue?

Apologies if someone already said something about this and I just didn't see it (possible, looked, but not super hard). I was messing w/ some masteries while I was waiting for a match. Adjusting some here and there, and when i was done and hit Save, "Unexpected Platform Error" popped up. Didnt think too much of it and went on w/ the game. Ended up an empty mastery page, so played w/o them. When i went back to double check it, the first 17 points were put into Resolve like i wanted, no Keystone, and the last 12 were not in at all. Only fix I seemed to find was restarting the client. Messed around with masteries some more to test it out, and seemed to happen mostly w/ Resolve Keystones. Anyone have any ideas??