Should we stop using password managers? No. They are still much better than the alternative (password reuse).
Although, taking a second to disable autofill functionality is a good move because this isn’t the first autofill bug we’ve seen, and I doubt it will be the last.
Also, this would not work if multi factor authentication was on, so you should probably enable that as well.
Lastpass has already pushed a fix according to the update to the article, but I think this advice at the end of the article is pretty sound!