Active question: Who is the youngest Starfleet Admiral?
Unintended duplicate post, now deleted: https://scifi.stackexchange.com/q/243734/12857
I typed out my question and clicked the button to post it. The page scrolled to the top and I got the "Our automated system checked for ways to improve your question and found none" message. I clicked again to post the question and closed the tab.
An hour later I came back to check if I'd gotten any answers and found that my question had been posted twice.
At no point did I copy/paste the contents of my question or click the "ask question" button again. I did open a few other SFF tabs to conduct research for my question and check for potential duplicates.