I have asked almost > 10 questions on Stack Overflow and all are having positive votes, but I have still not received the Curious badge.

As per the Curious badge description:

Ask a well-received question on 5 separate days, and maintain a positive question record

It is also showing in my profile that I have asked 10/5 well-received questions.

But still I have not been awarded that badge and showing me that this badge is recommended.

What might be the possible reason for this?