I recently asked a question, and in a comment Eric Wofsey observed that it was substantially similar to an earlier question I had not seen.
I agreed, and voted to close my own question. I expected that this would close it immediately, but it didn't.
Instead, the close vote was handled the same as if someone else had voted to close: it was only the first of the five required close votes. But also the Community Bot posted a banner that only I could see, advising me that a community member had identified a potential duplicate, and inviting me to close the question myself.
This I did, and it is now closed. But it seems strange to me that the process should require two steps. I am not sure whether to tag this as bug or feature-request.
Previously: OP has complete self-deletion power. Why does OP not have complete self-close power?