Chat problems(disconnetion from in-game chat after 5-10 mins of the game)

[Cricun]

Hi everyone,
I have quite a strange chat bug. When i start a game and play about 10 minutes, i cant see chat messages of other players, along with kill announces.Voice chat works properly and my friends see me as online.Reinstall didnt help. What to do?(
I hope u can help me, thanx a lot.