By doing my own small amount of investigation and troubleshooting. At least in 2 cases (me and a friend of mine) found out that the problem lied in Realtek audio driver compatibility with last D3 patch and windows 2004 update. Literally disabling on-boar sound and adding a sound card solved all the issues. that was the case with 2 different pc’s experiencing this issue. This does not say it’s 100% the full reason, but gives a very good starting point. The fact that blizzard tech support is literally ignoring this issue for more than a month now is just ridiculous. especially since there are THOUSANDS of people experiencing this issue, though most just don’t bother writing on forums/feedback or stop playing altogether. There is no QA in diablo anymore, otherwise this would have been priority no.1 to have the game fixed…