Last minute mastery change problem.

I have a habbit where I re make my masteries inbetween matches to adjust to my enemies... So this is the second time since the pre season update that I successfully change my masteries from scratch, click save, and get the "a OK" that they saved. I usually got 1 or 2 seconds still on the time clock, yet when I go to op.gg to check my enemies stats, I find that i have NO masteries selected, and in game I have no keystone set. aka this is a problem