I did what Jaminj suggested. Uninstalled, reinstalled on my Galaxy 20 +. The first time I went to use Evernote, It duplicated the first note I edited, causing a note conflict. Then After fixing the conflict, it did the same non-functioning checkmark or back arrow. I now know how to copy the note, crash Evernote. Restart and paste back in, but this is no good. I hope they can find a fix.