User blog comment:Visually/Don't do "Summer's Over Update" before claim your mastery rewards./@comment-26536836-20151008123247

I thought I used all the upgrades before update.

But when I updated it(because Nexus Player didn't get update so I logged-in with smartphone for get update), I can't see all my D and C upgrades. And even A upgrades.

I don't know how they did it--maybe they calcualted how many upgrades I already spent.