I did not expect that the image would be empty afterwards
This happened to me as well, but the preview image stayed in place, making it look as though the image was still there. But when the slideshow was played back, it was just blank. Very frustrating.
The volume of bugs in FM6 is very frustrating. I’ve gone back to FM5, and have sent support an email documenting all of the bugs I’ve encountered that make the new version unusable.