Custom Decorator Drawer Issue - BoxGroup is shifted down by 1 row

Hi guys. I am creating a [BoxGroup] attribute that will group serialized fields. The easiest way for me to explain the bug is to actually show you.

Here is the attribute

 public enum EBoxGroupCommand
 {
     Begin,
     End
 }
 
 [AttributeUsage(AttributeTargets.Field, AllowMultiple = false, Inherited = true)]
 public class BoxGroupAttribute : PropertyAttribute, IDrawerAttribute
 {
     public string Name { get; private set; }
     public EBoxGroupCommand Command { get; private set; }
 
     public BoxGroupAttribute(EBoxGroupCommand command, string name = "")
     {
         Command = command;
         Name = name;
     }
 }

Here is the CustomDecoratorDrawer

 [CustomPropertyDrawer(typeof(BoxGroupAttribute))]
 public class BoxGroupDecoratorDrawer : DecoratorDrawer
 {
     public override void OnGUI(Rect rect)
     {
         BoxGroupAttribute boxGroup = (BoxGroupAttribute)attribute;
         if (boxGroup.Command == EBoxGroupCommand.Begin)
         {
             BeginGroup(rect, boxGroup.Name);
         }
         else
         {
             EndGroup();
         }
     }
 
     private void BeginGroup(Rect rect, string label)
     {
         EditorGUILayout.BeginVertical(GUI.skin.box);
         if (!string.IsNullOrEmpty(label))
         {
             EditorGUI.LabelField(rect, label, EditorStyles.boldLabel);
         }
     }
 
     private void EndGroup()
     {
         EditorGUILayout.EndVertical();
     }
 }

Here is how I wanna use it in a MonoBehaviour

 public class MyMonoBehaviour : MonoBehaviour
 {
     [BoxGroup(EBoxGroupCommand.Begin, "Integers")]
     public int int1;
     public int int2;
     public int int3;
     [BoxGroup(EBoxGroupCommand.End)]
 
     public float float1;
     public float float2;
 }

And the result. It's very weird. The group is somehow shifted down by 1 row. Instead of the 3 integers to be in the group - the first 1 is ouside, and the first float field is inside. Any ideas?