Same problem with silent sound.
TS Server 3.0.11, clients 3.0.16
We are make 2 test in 2 last day.
1st try: 3 players. From mission start sound was at good level - no one report this problem. We are move around all Altis, from mounts to seaside and back, testing 148 radios. At mission end (~1hr later) sound level was terrible low. Shooting from pistol totally suppress direct voice and radios.
2nd try: 2 players. We are check same radios, with out changing or droping it. Just connect TS, start custom mission, and use ACRE2 replaced radios in unit pockets at missions start. Short testing - only ~5 min. from TS start. Cant test it longer for some reasons. All was good this time.
Server or client settings was same in both tests - SW versions, TS channel, codec, plugin and so on. Only one changes from 1st test - new ARMA3 1.32.
I think, problem is get out in only some time after TS plugin start: some variable is leaking, or new connected users change plugin environment.