YES! I'm having very similar symptoms since an (involuntary) update a month or so ago. (I notice the OP is from 2016, so apparently this problem is not version-specific.) I'm now at version 8.0 on a Motorola Razr M. Since the update, if I type a word (in a grocery list, for example), then hit return, as soon as I start to type a new word on the next line, it deletes the line above and starts typing my new word. Often, it leaves the first letter of the old, mostly deleted word. It's a total mess. If I try to backspace, sometimes it works, but often it duplicates pieces of the word I'm try
