OnInspectorGUI not being called on DefaultAsset in 2019.2.0f1

This code works fine in 2019.1 but OnInspectorGUI is no longer called in 2019.2

using UnityEditor;
using UnityEngine;

[CustomEditor(typeof(DefaultAsset))]
public class AssetPreview : Editor
{
    private void OnEnable ()
    {
        string path = AssetDatabase.GetAssetPath(target);
        Debug.Log("You have selected: " + path);
    }

    public override void OnInspectorGUI ()
    {
        Debug.Log("This should be called when any default asset is selected");

        base.OnInspectorGUI();
    }
}

I’ve submitted a bug report (1175246), but just wanted to know if anyone else has found this, or if something in Unity has been changed that I should be aware of.

Same problem here. My custom TextAsset editor stopped working. OnEnable, OnDisable, OnHeaderGUI are called, but not OnInspectorGUI

Unity have acknowledged it as a bug - hopefully will be fixed in the next release

Is there some kind of workaround for this? Forcing a call to OnInspectorGUI() somehow? I tried calling it from OnHeaderGUI() as GamerXP says it works, and it does do something, but other errors are thrown…

Edit:
I’ve just realised that the errors came due to another reason. Adding an override OnHeaderGUI() and calling OnInspectorGUI() from there is workaround for the Unity bug.

I have an asset that paints on scene, sometimes wont paint because seemingly the scene or inspector is not updated, could it be a similar to this bug issue ?

Thanks