I know auto correct can be finicky sometimes. Try voice to text. A couple months ago I was texting mom about some papers I had left on her table. Before I realized and could stop it I sent her a text calling her an old rotten apple.
Had a guy just yesterday tell me he tried to text friends that he was dropping off his wife "Marilyn" at a certain store. No matter what he tried the message came up "Marijuana" instead of "Marilyn".