In game chat party

in PS4
I've sent an email and made a post in support but haven't had a response. What's up with the in game chat party. You can hear some people and not others. Some people can hear you and some can't . It's very inconsistent , but when using a private chat party through PlayStation everything works fine. I've tried several different headphones same results. Also today I experienced a match where my whole squad could hear an enemies in game chat while in play . but he could not hear us. His red gamer tag was popping up as well. Thanks.
Comments
I've seen players pop in and out of global chat, I think that is what it is referred to, when there on the opposite team but you can hear them. The other issues where nobody can hear me or i can't hear them seems to happen when i was playing another game and then jumped onto this one. A quick system reset always resolves the issue though.