It's not a glitch. There's an article on the ecommercebytes site "eBay Eliminates Purchase Details from Feedback System"

Because eBay did not announce the change, many wondered if it was a glitch or a test. But eBay spokesperson Ryan Moore confirmed it was a deliberate policy change. "Based on customer feedback from both buyers and sellers, we have made the decision to remove the view item link and item ID information on Buyer and Seller Feedback profiles pages," Moore told EcommerceBytes.