I made a couple of edits to the text of a profile and either WikiTree autosaved a draft or I may have manually saved, I don't remember. I left it open for awhile, edited some other profiles, and went back to it. The message "your draft is fully saved and up to date" was there. I clicked the Compare Draft link and got the message that there was no draft to compare, even though the edit box had the orange border. The full save button was grayed out. When I tried to close the browser window, I got the message that my changes had not been saved.
I closed it anyway (after copying the entire text to the clipboard), and then reopened the profile. All the changes I had made were there.