I have scarcely been able to finish a single game. After a while, usually once I have secured an advantage or have managed to fend off threats, my opponent stops moving. His clock continues to count down but he does not more. Furthermore, when I type chat messages to him these messages are not echoed in the chat comments display window. All of this suggests that my opponent is no longer connected despite superficial appearances to the contrary.
When I quit these games (instead of waiting a long time for my opponent's clock to count down to zero) I am told that I lose by default for quitting.
Please fix this problem.