Drag and drop images to assets folder do not show up

Wappler Version : 2.4.2
Operating System : Mac OS Catalina

Expected behavior

Drag and drop from finder images to the assets panel. They are copied to the assets folder: works OK. They will be visible after copying in the assets panel: NOT working

Actual behavior

Images get copied, but become not visible in assets folder. Only after restart Wappler, they become visible.

How to reproduce

Open assets folder. Open finder and drag and drop a couple of images to the assets panel.