There is a definite problem with vox! Doesnt matter if you check sequence or not some transmissions are being cut out.
At first I thought it only was with the tune-able channel but recently I have noticed it on range as well,you can see the name light up but hear no sound,then it seems to hang, you can see the name but the other person isnt keyed up.
Part of the issue could be vox loosing patckets as the internet in the US seems to leave much to be desired,some nights vox is worse than others! I have tried many fixes on my end and nothing seems to help so I'm left with either a game issue or a net issue...... not sure which is which.... But there is a definite problem!
YMMV!