You forgot what you said. They didn’t. That’s how it usually works.

Words cost the speaker almost nothing and can sit with the listener for years. You move on because the sentence was a passing thought in a busy afternoon, while they replay it because it landed on something that mattered to them. The imbalance runs both ways, which is why you still remember remarks other people have entirely forgotten making.

Assume what you say is being kept, especially around anyone who looks up to you. If something old is still sitting between you and someone, mention it, since they almost certainly remember.