Well today i made in game report about same issue, moderator told me to post in forum about this problem because he never heard about this issue from anyone. Just so you know, there is more people with this problem.
So okay, i have 2 laptops. One is weak and other one is good. When i run game on my weak laptop, Voip works okay, got no freezing, just game is laggy because laptop is weak (12gb ram, gtx 940mx, i5-7200u).
And if i run game on my gaming laptop, whenever Voip is working got lagg spikes, and most of the time im loosing connection to server.. If i kill my Voip, game works perfectly 100fps+ with no freezing. (8gb ram, gtx 1060, i5-7300HQ).
Maybe my reply will help you also.