How to properly deal with EditorGUI.indentLevel in custom PropertyDrawers

If I have the following code snippet in a CustomEditor

 EditorGUI.indentLevel++;
    EditorGUILayout.PropertyField(testProperty);
 EditorGUI.indentLevel--;

If the testProperty’s CustomPropertyDrawer uses say..

 flag=EditorGUI.Foldout(position,flag,…)

Then the graphical layout for the foldout button does NOT match the clickable area of the foldout button. I need to click to the LEFT of my visible foldout button, in order for the click to be detected.

Why does EditorGUI.indentLevel>0 cause such a misalignment between the drawn location vs. the clickable location, and what is the proper way to deal with this?

Do I actually need to manually/temporarily override the EditorGUI.indetLevel value, and recompute the “position” Rect, that is passed to my CustomPropertyDrawer , like so? (I feel like this should be happening for me, automatically. In fact, it seems like it halfway IS.)

 public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
 {
    int recordedIndentLevel=EditorGUI.indentLevel;
    position.xMin += EditorGUI.indentLevel * 10.0f;  //FYI: 10.0f is incorrect, not sure yet how to get actual indent size
    EditorGUI.indentLevel = 0;
 
    //draw stuff using position rect
    flag=EditorGUI.Foldout(position,flag,…)
 
    EditorGUI.indentLevel = recordedIndentLevel;
 }