All responses are on time, solid 5 star reviews and shipping on time or early, I lost the Star Seller badge for last month, can someone explain why.
There is also a minimum number of sales and $ amount
The boxes under star seller on your dashboard will show which one is less than 95%. Then you can download the report to see which one(s) Etsy deemed did not meet the criteria.
None of us have access to your stats, so can't explain it. Did you meet the threshold of at least 10 sales and $300 during that 3 month period from March/April/May?
You need to check your reviews. You had a 4 star review
It looks like you received a 4 star review on March 29th. You didn't have enough 5 stars to offset it.
The info should be right there for you to review on the star seller page in shop manager. You should be able to find out the 'why' by looking at that page. Be sure to check the 'last review period' tab as those are the numbers used to award the star June 1st.
I'll venture a guess that it may be the 5 star review bit that's the issue. You received 15 reviews during the review period. 1 of them was a 4 star dated March 31st. The calculation is basic math percentages. Number or 5 star reviews received during review period divided by total number of reviews received during review period. So in your case 14 5 star reviews divided by 15 total reviews or 14/15 = 0.9333 or 93%