We will need more info to diagnose this issue for you. Please post a WinMTR as a reply.
As to why this only happens in Blizz games for you, more info here: Common Technical Issues and Solutions - #23 by Drakuloth
We will need more info to diagnose this issue for you. Please post a WinMTR as a reply.
As to why this only happens in Blizz games for you, more info here: Common Technical Issues and Solutions - #23 by Drakuloth