On the plus side, the last time this happened to me, I discovered that someone had posted a really useful answer to my question which helped solve me problem.
The person who had posted the answer was, of course, also me.
this is working as intended; the web is an external memory.
My experience is that said person coming back to my thread is a coworker. Then they tell me they can't get away from me and even after they try to find something on their own I helped them fix it. Quite amusing