Game goes up to 2-2.5GB memory within minutes of starting a game, maybe being partially responsible for massive lags, UI being unresponsive.
I still get other player's actions in realtime, so they may not be affected, in other games they have the problem.
Looks like there's also a cpu starvation problem, as CPU usage jumps up to 25-30%, so cpu starvation in one of the threads.
There are two "Coherent UI" exes running, one at 3% one at 15%.
What more infomration do you need?