@gsg_9_lightning Device doesn't matter. Other players playing with me are experiencing this bug every time we play. You can see other similar articles experiencing this bug like me.
When player kills who is shooting, his gunfire sound keep going.
You can see what's going on in the video link down below:
I found the solution is loot dead one's gun. Then sound stop. (This is not in video)
Please fix this bug. This is quite annoying.
I played it and really enjoyed several times. But it sometimes doesn't sound at all. Then I should exit the game and restart. If i play another game it works normally, including previous Insurgency game, too.