Issue with the Front end editor wiki

Hi – I have just set up the wiki plugin in a test site to try it out. I can create wikis and sub wikis fine. I have set the permissions to anyone can edit (front end.) When testing it out I click edit from the front end which takes me into the front end text editor. When I make a content change and click save, all the text in the article disappears. If I go back to the home page and click on the wiki title generated by the widgets the content is still gone. If I check into the actual wiki through the backend the text has disappeared from there as well.
I am using the most recent version of the plugin and wordpress, I don’t have any plugins beyond the default installed and I have tried with several different themes. Am I missing something?
Thanks