Thumbnails in Organizer Tray do not auto-refresh

[progman48]

I am currently on Paintshop Pro 2019 (Ultimate), but I have experienced the "auto-refresh" problem in multiple previous versions. In the Edit mode, the thumbnail in the Organizer Tray that corresponds to the open image in the workspace sometimes updates each time that open image is updated and then saved. Other times, I have to manually refresh thumbnail in the Organizer Tray with a "right-click" in the Organizer Tray. I have created more than one trouble ticket, but have never solved this issue. I have been told to empty the cache in the "Preferences" section, but this works only sporadically.