For quite a few patches now I've had issues with post-game client issues. Many have complained about the time it takes to load into the post game screen. I am often the last person to load in and my friends often tell me to hurry up because they have already honored, reviewed stats, and have hit "play again."
Anyhow, the present bug is that when I rank up after winning promotions, I get a blank screen and have to reload. I have waited up to 60 seconds but nothing happens.
Please work on these post-game client issues. They didn't used to exist (even in the new client) but have sprung up partway through the season and have gotten consistently worse.