If your idea won the vote and flopped, say so first. People follow the person who owns their pitch.

Whoever argued hardest for the plan is the one everybody is watching afterwards. Saying it yourself takes the awkwardness out of the room and spares anyone else the job of raising it, which is a small act of leadership that gets noticed precisely because it is rare. Waiting for someone else to mention it costs far more.

If a call of yours has gone badly, say so plainly at the start of the next conversation, with what you would change. No long justification of why it seemed right at the time.