All sorts of stuff goes wonky when they update or work on the website, which seems to be ongoing.
Copy the text before you 'save' the week. If still fucked up, you'll just have to wait until they fix it. This way you don't have to re-ttype it.
This hasn't haapened to me, and i write novellas. Try a different browser, maybe? It'd be odd that this would happen to one person and not all people. Means it might be caused locally. any odd charcters? i notice if enclosed by 'less than/greater than' signs it disappears from sight. those angled bracket things i don't know the official name for, lol. as something to do with html. Thnks it is an html "tag"