Weird IP Display Bug

So I just bought Riven (please go do your hating in gameplay and balance). I had 4,978 IP before I purchased her. The purchase went through without a hitch. However, when I left the store, instead of displaying 178 IP, my IP counter was displaying -4,662 IP. I logged off and logged back in and the bug was fixed, but it is kind of annoying (I noticed it when I purchased Lissandra, but was hoping that it would be fixed in 5.16. No such luck.). Riot, I think this is probably just a little bug in your IP display code. Could you look at ironing it out?