In game lag every match

Hi,

You said previously: "game starts downloading in background" but what it was downloading exactly ? HQ Textures ? Last Updates/Patches ? Something else you don't have mind about ?
In all cases, can you let it starts to download the stuff, go out the game, to wait and let this 'smart download device' to finish his damned job and to try to join a game again ?
If you are sure it downloads something, the best thing is to let this stubborn to finish his download before you to try to play again, don't you think ?
The bloody game certainly needs this stuff to run correctly... I mean "to run without lags" ('optimization shaders' is the 1st.step) more precisely...
How can you be sure it was a download in background please ?

I didn't noticed this sentence: " It fixes in a few minutes". So here, do you mean the problem comes back when you shut the game & to load it again to join another game ? Apparently, this problem is recent for you ?
I'm just curious, I don't say I can help you very well. But if I can give your some ways to further investigate it probably helps you anyways.