How to check the SerializedObject changed event when I using UIElements?

[watsonsong]

I think I met a BUG in TrackPropertyValue. It not work with SerializeReference.
I post another question to clarify:

TrackPropertyValue not work in SerializeReference

I add some test code: using System; using UnityEditor; using UnityEditor.UIElements; using UnityEngine; using UnityEngine.UIElements; public class TestBehaviour : MonoBehaviour { public Weapon weapon1; [SerializeReference] public IWeapon weapon2 = new Weapon(); } public interface IWeapon { } [Serializable] public sealed class Weapon : IWeapon { public string name; public int damage; } [CustomPropertyDrawer(typeof(Weapon))] public sealed class WeaponDrawer : PropertyDraw…