I'm passing this thread to the audio team as this has been a really big issue. But the info here is really great! Thank you all for your due diligence on trying to fix it on your end and reporting your finding. This really does help to nail this issue down.
Also for anyone else who sees this, please let us know as all the additional steps you've taken on your end to fix this as this is our next big issue to tackle. Also the situation in game you were in that it occurred (ie. Reviving someone, initial drop, characters in party, and console ( PS4 vs PS4 pro, etc)). Every single piece of info, no matter how small does go a long way. Videos also help.
Cheers and thanks you!