Same issue, unfortunately;
- All folder icons correctly yellow
- Open a folder and save a mix of .cr2, .xmp and .jpg files
- Go back up one level and observe that after a split second, the yellow folder icon is replaced with one of the images it contains
- Open the folder again
- Delete all the files (click, shift-click, shift-delete)
- Go back up one level and observe that the folder icon still displays as the same image as in step 3
- Refresh File Explorer - no change
- Eject and insert the USB SSD - no change
- Reboot laptop - no change
Repeat the test with a folder on the laptop's main SSD - no problem. All works perfectly and the folder icon correctly reverts to yellow when all its contents are deleted.