I have the same problems with Evernote Android app. My notes won't save. I guess it's trying to sync but nothing happens after I press the green check mark. I can't leve the note and go to EN:s main menu because the meny button is not working. If I quit the app and restart EN, it stars up showing the same note, but parts of the text I entered is now missing!
I've used EN for many years, writing four books and doing enormous amounts of research. I need EN to work with my phone. But it's not working and I have no idea what to do.