With the latest upgrade, the mask effect preview no longer works. In the previous version, I can see this preview after tap and hold on the image after pressing the slider. This feature also worked in the Light Panel when adjusting Black and White points. This no longer works properly. On this version, I can see the mask effect preview for a split second then it's gone. Is this a bug introduced with the new version? Or is there another method in gaining this functionality back? Call me old school but I use this feature all the time in my edit workflow.