The phone counted a row shown as not sent when it matched a send's echo, and
took it as the newest row the echo had to land after. Once the resend lands,
the host hides that row, so the echo expected one copy too many and never
retired, leaving a plain duplicate bubble; an answer-lost resend read as
unconfirmed. Not-sent rows no longer count toward either.
Brennan Benson
bb8889997a