The problem seems to only occur in the open world during Fates and battles being surrounded by lots of people. Very often the sound effects will cut off for example 3 or 4 paladins all use rage of halon then buffs/debuff/casting sounds plus normal attack sounds effects and the enemies sound effects. The server or game client can't produce all these sounds at once for long periods of time and cause all sound FXs to cut out and go silent. It seems like the client only wants to produce the sound once at a time instead of playing multiple instances of the particular sound effect. There are 2 ways to fix this problem and I will post them as replies.