I just noticed that one off-topic flag on a question on Skeptics was dismissed by community, but there is no obvious reason why that should have happened. The only case I know of that causes off-topic flags to be dismissed automatically is when the question is closed. That wasn't the case here, the question was still open when I saw it (though I closed it now).
The flag history shows that the flag was dismissed by community:
I see no reason for community to dismiss these flags and it should stop doing that as this hides actual problems from us moderators.