Only accumulate ambience cd when in a new tick (#5623)

Content.Client/Audio/AmbientSoundSystem.cs

@@ -10,6 +10,7 @@ using Robust.Shared.IoC;
 using Robust.Shared.Map;
 using Robust.Shared.Player;
 using Robust.Shared.Random;
+using Robust.Shared.Timing;
 
 namespace Content.Client.Audio
 {
@@ -19,6 +20,7 @@ namespace Content.Client.Audio
     public sealed class AmbientSoundSystem : SharedAmbientSoundSystem
     {
         [Dependency] private IEntityLookup _lookup = default!;
+        [Dependency] private readonly IGameTiming _gameTiming = default!;
         [Dependency] private readonly IPlayerManager _playerManager = default!;
         [Dependency] private readonly IRobustRandom _random = default!;
 
@@ -75,6 +77,8 @@ namespace Content.Client.Audio
         {
             base.Update(frameTime);
 
+            if (!_gameTiming.IsFirstTimePredicted) return;
+
             if (_cooldown <= 0f)
             {
                 _accumulator = 0f;