I got notification from ExpertFlyer saying R became available.
I checked my reservation, but my upgrade supported by GPU hadn't been cleared. It's domestic segment in part of international itinerary. International segment was already upgraded.
I called UA and the agent tried to clear my upgrade. After the long wait she did, but then the system pulled 3 RPUs from my account and she didn't know how to fix it.
I had to call MP desk to ask for the correction during MP business hours, but I was told it would take at least 24 hours to get the 3 RPUs back in my account.
We'll see...