[game client] Game hangs for 1-2 minutes upon victory/defeat.

I'm having a very consistent issue with the client hanging for 1-2 minutes after each game concludes, right before post-game chat and review.

Steps to reproduce: win/lose a game on SR; observe the victory/defeat cenematic; click "continue"; wait for 1-2 minutes for the client to respond; then post-game chat finally comes up. Frequency: 8/10

My system: AMD Pheneom II Radeon Sapphire 280 16 Gig DDR3