[PR2 Bug] PR2 screen goes black when forfeiting

[Master Raiden]

Problem: The PR2 screen goes black after clicking the Quit button in a race
Type of Problem: Client
Expected Behavior: The level is still visible when you forfeit
Actual Behavior: The screen turns black and most UI elements are missing when you forfeit

Steps to Reproduce the Problem:
1. Enter a 4 player race on The Stone Age by Shadow Z (5830113)
2. Forfeit shortly (a fraction of a second) after the countdown ends
The Race Complete dialog box appears, and the rest of the screen turns black

This only happened once, and I'm not able to reproduce it

Edit: It happened again. I forfeited before the countdown ended and the screen went black.
The only difference is that the Return to Lobby button was not responsive.
Video: https://www.sendvid.com/q0520w7a


Additional Information:
All audio stops playing.
Your account remains online when this happens.
When I logged in to the same account on another PR2 instance, the Disconnected and You were disconnected because you logged in somewhere else messages were fully visible and I was able to close them.

After clicking Return to Lobby, the screen looks like this:


Right-clicking anywhere except the mute/unmute button brings up this menu, the same one you get when you right-click when a dialog box is open.