This doesn't happen everytime and it's worse when my battery is below 40%, but if I've typed something and want to delete it, as the cursor is moving back the phone reinserts words. So I'll be deleting the word "delivered", and as I delete back and get to "de" the phone reinserts delivered again and the cursor miles to the end so it ends up saying "dedelivered" and I have to delete it all again. But it will then do it for every word and I end up deleting two sentences. Or if I then go to add an extra letter or punctuation mark onto the end of a word it deletes the preceeding letter. It's so annoying! I'd post a video or something to show it but don't have anything to do it with.