Now it is confirmed that I found my barb keep freezing in games while doing rift or GR. I use rend based build and when I play it keep freeze all time for short sec then normal then freeze again. Funny things is around me all monster are not frozen so I get hit and even dead also 2 times on hardcore mode.
It can not be my internet issue since I have cable connection which stronger then other but it more strange it happen in Barb only. I played DH,WD, even all other characters not happen to them. Even my friends told me so not allocate any skill point to area damage which I did and that work ok for a while then happen again.
Blizzard fix it … this is bug.