And here I was annoyed Alaska had RUBY written on my digital boarding passes... as an Emerald... I just assumed it was because I was Ruby when I booked the ticket or they only tell each other our status' every once in a while. But here your situation is AA 100 percent, right?
I'm sure the answer has something to do with reaching Plat Pro two days ago and likely doesn't have a fabulous explanation. Likely the upgrade pulled a forced refresh of your account?