Mac Yosemite Disconnects

hi there i was wondering if someone else has this problem, i have a macbook pro with retina disp, 2015 so it came with yosemite, and when i play league of legends, there's always one issue that keeps annoying me, its been since 3 patches already, my client just disconnects every time i leave it without doing anything for a couple mins, and it's a weird bug, lets say im playing a game i can play the game, but when its finished and im coming back to the client to see stats or something it is there stuck with the message saying i got dissconnected, so i can't see stats, report a player not anything.... it always forces me to close the client.... anyone knows a solution? thanks!