It is supposed that "Community" is an automated service.
But a couple of times it made some human decisions.
Like this question.
I voted to close as duplicate. But as soon as the issue was fixed, "Community" closed it.
Was it done by a human?
When you voted to close the question, the system asked its author a question similar to this:
The author conceded that the linked question you provided did indeed solve his problem. The system - represented by the Community user - reacted to this by closing the question.
This is generally a much more expedient method of handling duplicates where the author is around and responsive.