Unfortunately I don't have any hope that DICE will fix this bug. Why? This bug has been present in all of DICE's games running on the Frostbite engine since Battlefield 3 launched over six years ago, including Battlefield 3, Battlefield 4, Battlefield 1, Star Wars Battlefront, Star Wars Battlefront II, and Mirror's Edge: Catalyst. I know because I have played them all and experienced the same issue in each of them (except Star Wars Battlefront, which I only played for 4 hours), even when playing on different platforms. I've also read that it is a common bug in many other Frostbite games such as Dragon Age: Inquisition, Mass Effect: Andromeda, and FIFA 2017. It has not been fixed in any of those games, so I would be rather surprised if they fix it in this one.
Just take a look at this huge EA Answers HQ thread for the same issue in Andromeda, which is currently up to 324 points and 179 replies: loss of sound on mass effect andromeda
According to posts #148 and #159 in that thread, BioWare has confirmed that this is a known issue with the Frostbite engine.