Group section never appears again

[emptybraces]

Describe the bug Group section opened once , then closed, it never appears again.

Code Sample

using TriInspector;
using UnityEngine;

public class NewMonoBehaviourScript : MonoBehaviour
{
    public Test1 test1;
    public Test2 test2;
}

[System.Serializable]
[DeclareFoldoutGroup("Group")]
public class Test1
{
    [Group("Group")] public float Speed = 10f;
}

[System.Serializable]
[DeclareFoldoutGroup("Group")]
public class Test2
{
    public int n;
    [Group("Group")] public float Speed = 10f;
}

Screenshots

https://github.com/user-attachments/assets/7c0065dd-21fa-4052-a31b-10e1eb11e53d

Desktop: Windows11 Unity version: 6.2.7f2 Tri Inspector version: c8b54a71b8066714733078658bb211c90dfbd2ed