I just want to point out that I had a duplicate message sent to me. I responded to the first, but did not to the duplicate, as I didn't want to confuse the buyer. This brought my rating down significantly.
Just for the record, that one message "missed" is the only message that I "haven't responded to", in the 24-hour time period since the star seller program started. "One message", in 6 months. It seems to me the formula by which Etsy determines the star seller badge is pretty strict, and perhaps a little ridiculous.
This is not a technical error.
Go to your Star Seller page and scroll down to the Q&A section.
https://www.etsy.com/your/shops/me/star-seller
Questions? We’ve got answers. -> Messages -> What happens if I’m getting messages from the same user through multiple message threads?
If messages are appearing in separate threads in your inbox, then as it stands today you’ll need to respond to the initial message of each thread. One idea to help mitigate this in the interim is to set up an auto-reply or to create a Saved Reply for multiple messages from the same user that don’t need individual responses.
Sadly, you have to reply to them all. I usually just say, "please see my reply to your other message thread". But I always say something so I don't get dinged by this. Sorry this happened to you!
This is not a technical error.
Go to your Star Seller page and scroll down to the Q&A section.
https://www.etsy.com/your/shops/me/star-seller
Questions? We’ve got answers. -> Messages -> What happens if I’m getting messages from the same user through multiple message threads?
If messages are appearing in separate threads in your inbox, then as it stands today you’ll need to respond to the initial message of each thread. One idea to help mitigate this in the interim is to set up an auto-reply or to create a Saved Reply for multiple messages from the same user that don’t need individual responses.