Wrong Masteries Load in Draft

I have experienced this twice now, and I think it is reproducible. It seems to occur when swapping game modes.

1. Play SR (in my case, as Akali, though it doesn't have to be).
2. Play ARAM (in my case, I had Kalista, who has a mastery page called "Kalista").
3. Play SR (in my case, Akali again... see below).

Here is what happens, your Runes read the rune set you had in the ARAM game, but your mastery set lists whatever you have in slot 1 (for me, that is "Akali"). So, when loading into the new champ select, my Runes read "ADC" and my Masteries read "Akali". I changed my runes but didn't bother touching my masteries.

I get in game, and I have my "Kalista" mastery page.

This happened to me once before when I had Lux in ARAM followed by Akali in SR (even though champ select said Akali rune page, I had one of my mage rune sets).

Please look into this.