Besides, this bug didn't exist until the last patch.
True. And there's a similar type of issue with the lighting on Xbox. Just because a problem manifests after a specific patch, that does not automatically mean that it directly caused the issue: correlation is not causation. It's not that simple -- especially not when dealing with huge amounts of code.
Numerous people with different tvs, monitors, different sound setups have reported the problem. As for me, I have the same issue on two different monitors, and on two different sets of headphones. I have also reinstalled the game twice, created a new save, even changed my hdd...
I find it a bit hard to say that the issue doesn't lie on the code and that its source couldn't be identified. It just seems the devs don't care to look into it, but I could be wrong this last part. The fact that there is no response to support tickets suggests otherwise tough.
And again, what about the vast majority of people that do not have the issue? What about the hundreds upon thousands of PS4 / TV / speaker combinations that do not experience the audio popping? Not with this version nor prior versions.
What's different? What, exactly, changed? Why is it affecting this system...but not this one or this one? What's the answer?
This is where, unfortunately, the answer is: "Don't know." I may try a hundred tests, then a hundred more. I may get the issue to appear 10 times in a row, but when I move to the next setup, I can't get it to appear at all. I find a fix for two situations, but with the third and fourth, it doesn't work. That's just the nature of troubleshooting.
But I will conclude with this, once more:
If the problem were a direct result of the code, then every single person on PS4 would be experiencing exactly the same issue. Every person. That's what an error or bug in the code would mean. That's not the case. The issue might be fixed or worked around with a patch to the game's code, but that doesn't mean it's being caused by the game's code.
Just because a third-party writes some software that conflicts with a game's code, it doesn't mean that it's the game's fault for not knowing some other business was doing things differently. Nor is it the fault of the third-party for not knowing that some game wouldn't work with their software. And it's not the third-party's responsibility to fix it, either. In fact, they might even reject the game devs' request for help, making it impossible for them to do anything about the game, even if they can prove what's causing the issue.
There are a lot of potential hurdles that can make this a very difficult problem to solve, or leave the devs with no recourse.
If the game just won't work correctly, that's something to take up with Support.