Another note that may or may not apply in your case..... sometimes if you are typing on an iphone / apple devices (not sure about android but presumably similar) the autocomplete will add a space after the word which in my case i have autocomplete set up for my name so i can type 3 letters and have the rest fill in automatically and my username is often initiallastname so i have to make sure to delete the space it adds in (anticipating that there will be more words to follow) when signing in to certain sites ... Imagine you might have solved this issue already but maybe not or maybe someone else may benefit..
