League Client Crashed When Upgrading Mastery to LV 6

Has anyone else experienced this? I was upgrading my mastery on Morgana and once I combined the two seals (or whatever they are called) and paid the 500 essence the client crashed forcing me to relaunch the game, once launched it immediately showed that I ranked up to lv 6 mastery on Morgana, it was just weird that it crashed when doing it.

~gwynbleidd43254