DevonThink To Go edit markdown, but not save

iPhone and iPad, v3.5.3 (17233)
Created a markdown note, added text. All OK. Go back, select edit. Can type more text but no option to save, any changes are lost. Only have the formatting options and small circle with cross to close the document.

Able to edit on Mac and see updates on the Phone or iPad. But as above, gives the option to edit, but not to then save.

See here.