fix: item picker not allowing changes at runtime

Author: brunomikoski

CHANGELOG.MD

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - `CollectionItemQueryPropertyDrawer.IsCombinationImpossible` no longer reports false positives for `Any` + `NotAny` and `All` + `NotAll` rule pairs. Impossibility for these now requires the stricter *subset* relationship between pickers (not just any intersection), matching the real-world satisfiability. `All` + `NotAny` continues to be flagged on any intersection, which is correct.
+- `CollectionItemPicker` and `CollectionItemIndirectReference<T>` now implement `ISerializationCallbackReceiver` to invalidate their runtime caches on deserialization, so inspector edits to a picker during Play Mode take effect immediately instead of returning the stale cached `Items`/`Ref`.
 
 ## [2.5.1] - 06/04/2026
 ### Added

Scripts/Runtime/Core/CollectionItemIndirectReference.cs

@@ -67,7 +67,7 @@ public bool IsValid()
     }
 
     [Serializable]
-    public class CollectionItemIndirectReference<TObject> : CollectionItemIndirectReference
+    public class CollectionItemIndirectReference<TObject> : CollectionItemIndirectReference, ISerializationCallbackReceiver
         where TObject : ScriptableObject, ISOCItem
     {
         [NonSerialized]
@@ -152,5 +152,15 @@ public void SetCollection(ScriptableObjectCollection targetCollection)
             collectionLastKnownName = targetCollection.name;
 #endif
         }
+
+        public void OnBeforeSerialize()
+        {
+        }
+
+        public void OnAfterDeserialize()
+        {
+            hasCachedRef = false;
+            cachedRef = null;
+        }
     }
 }

Scripts/Runtime/Core/CollectionItemPicker.cs

@@ -11,7 +11,7 @@ namespace BrunoMikoski.ScriptableObjectCollections.Picker
     /// work if the enum had the [Flags] attribute applied to it.
     /// </summary>
     [Serializable]
-    public class CollectionItemPicker<TItemType> : IList<TItemType>, IEquatable<IList<TItemType>>, IEquatable<CollectionItemPicker<TItemType>>
+    public class CollectionItemPicker<TItemType> : IList<TItemType>, IEquatable<IList<TItemType>>, IEquatable<CollectionItemPicker<TItemType>>, ISerializationCallbackReceiver
         where TItemType : ScriptableObject, ISOCItem
     {
         [SerializeField, FormerlySerializedAs("cachedIndirectReferences")]
@@ -343,5 +343,14 @@ public bool Equals(CollectionItemPicker<TItemType> other)
 
             return true;
         }
+
+        public void OnBeforeSerialize()
+        {
+        }
+
+        public void OnAfterDeserialize()
+        {
+            isDirty = true;
+        }
     }
 }