Fix some mispredict reconciliation issues. (#6319)

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Shared/Damage/DamageVisualizerKeys.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.Damage
@@ -11,4 +12,20 @@ namespace Content.Shared.Damage
         DamageUpdateGroups,
         ForceUpdate
     }
+
+    [Serializable, NetSerializable]
+    public class DamageVisualizerGroupData : ICloneable
+    {
+        public List<string> GroupList;
+
+        public DamageVisualizerGroupData(List<string> groupList)
+        {
+            GroupList = groupList;
+        }
+
+        public object Clone()
+        {
+            return new DamageVisualizerGroupData(new List<string>(GroupList));
+        }
+    }
 }

Content.Shared/Damage/Systems/DamageableSystem.cs

@@ -87,7 +87,10 @@ namespace Content.Shared.Damage
             component.Dirty();
 
             if (EntityManager.TryGetComponent<AppearanceComponent>(component.Owner, out var appearance) && damageDelta != null)
-                appearance.SetData(DamageVisualizerKeys.DamageUpdateGroups, damageDelta.GetDamagePerGroup().Keys.ToList());
+            {
+                var data = new DamageVisualizerGroupData(damageDelta.GetDamagePerGroup().Keys.ToList());
+                appearance.SetData(DamageVisualizerKeys.DamageUpdateGroups, data);
+            }
             RaiseLocalEvent(component.Owner, new DamageChangedEvent(component, damageDelta, interruptsDoAfters), false);
         }
 
@@ -198,7 +201,7 @@ namespace Content.Shared.Damage
             component.DamageModifierSetId = state.ModifierSetId;
 
             // Has the damage actually changed?
-            DamageSpecifier newDamage = new() { DamageDict = state.DamageDict };
+            DamageSpecifier newDamage = new() { DamageDict = new(state.DamageDict) };
             var delta = component.Damage - newDamage;
             delta.TrimZeros();