This also -but not sure- might be the cause of weapon desync between characers which results in the lack of shots being heard, or the wrong sounds being heard entirely.
In a stream a week ago Break had an ak47, he fired an entire 30 round mag right infront of me and it made no sound. Then he added a suprressor which I could see, when he fired the gun was supressed. He took the supressor off and fired another 30 rounds without the supressor, but my client hadn't been told about the supressor removal and I heard 30 rounds of supressed, while he was clearly firing unsupressed.
A periodic sync check to ensure each player in a network bubble has the correct current status or weapon/stance/attachment is desperately needed, or some similar fix.