I reported this problem before, but it seems to have reoccurred. Metadata already entered is disappearing from images that have already been published. The Lunar Eclipse image I uploaded was fine for the last 2 days. I got a comment on it and when I went to reply to the comment I saw that the title, description were gone and it had gone into Uncategorized. I have already re-entered the title and description but this has to be a bug in your system because it is happening randomly and to images that are already published.