A :suggestion whose from is the same as its new text changes nothing, so it renders as plain text and its note is lost. Change the new text, or remove the suggestion.
Incorrect
To
To :suggestion[sign in]{from="sign in" note="The button says Sign in."}, enter your email.Correct
To log insign inThe button says Sign in., enter your email.
To :suggestion[sign in]{from="log in" note="The button says Sign in."}, enter your email.