High latency, lag and freezing

Last 2-3 weeks also get random like spikes just like when TWW launchess completely random spike same stuff that was mentioned in several topics after TWW launch and season, now when next season is coming some players returning and it back again not much soo far but it happening. When alt tab to battle net app the pictures etc stuff there on wow page reloads almost instantly but in game its like 1+ minute lag spike… chat works but u cannot doo anything