Referenced photos edited out of photo are changed only while new original is connected
I use Photo on my iMac with BigSure with referenced original on an external SSD JPEG and raw.
If I edite the original on the SSD with Photoshop Elements 2020 after it has been imported into Photo, I see the edited images into Photo only if the external SSD is connected. Without the Ext SSD the image into Photo remains unedited until I connect the SSD again. I tried to import the picture again but it seems to be impossible. If I consolidate the picture then Photo imports the edited version as a new picture adding it to the folder.
Any way to avoid this behavior ? Ok importing into Photo all pictures only after editing them with Photoshop could be a solution but I like to work the other way going to Photoshop only to do some editing which I am not able to do with Photo.
Thanks for your suggestion.
iMac 27″, macOS 10.12