Images edited in Editor show up in Organizer as torn file icon

In Photoshop Elements 2020 running on MacOS catalina 10.15, images processed in Editor do not show up in Organizer (I get a torn file image). The images are processed in Editor and saved in other formats on an external hard disk. The images are then closed in Editor but appear in Organizer as a torn file icon sometimes with the brief caption ''edit in progess'' which disapears after a few seconds leaving the torn file icon only. After one or two computer shutdowns, the image reappears in Organizer as processed. Can someone help me fix this somehow or is Adobe encountering as a computer bug I just have to live with until resolved ??