I think I know what you are referring to. I have had this problem before.
Typically what I have done is when the mistyped email address come up in the
autofill, I usually go back and delete it, and that usually does the
trick....I hope that works for you.
Yes, actually, after I sent the question, I did a search for autofill... I
know I should have searched first... anway, this is what I found and it
worked! Thanks for your answer! Have a lovely holiday!