[CLIENT] Rune/mastery selections changing between game lobby and actual game

Now I know I'm not crazy.

I loaded into a new champ select lobby and it was already showing my "tanky support" runes and masteries. I go into game and quickly realise that instead of 'tanky support' I have 'lane tank' masteries. I know because I was obviously missing the extra gold from bandit, but I still had Bond of Stone as keystone. The next time I loaded into a new champ select lobby, it was already showing my "tanky support" runes and masteries...

I can't be the only one that has had something like this happen. The worst thing is how inconsistent it seems and trying to weed out when this happens as opposed to just forgetting to change them yet again after the 10th lobby dodge.