Why clear the chat after the victory?
This doesn't make much sense to me. Players tend to like to discuss the game afterwards, you don't even need the popup or "overlay". You can see all that same info in the game as it is. basically just update everyone's final points in the main screen and then allow people to look at stats from there while also enabling chat.
Also, i'm aware that at least in 1.9 you could chat afterwards, but only if you stay on that screen, if you check some stats and come back the chat is wiped out again. Why?