Share link referral % Issue

Hello! I recently sold my first piece using my Manifold contract and there seems to be a bug with the share link %. The winning bidder accessed my work via my personal link, the direct link. There was a share link created by the first bidder and when that happened, the bidding history looked like this:

The final collector, winning bidder, doesn’t know the first bidder, the person who created the share link, doesn’t follow them on twitter or any social, and confirmed that they only accessed my piece via the direct link I have on my twitter.

The person who created the share link still received their 7% cut.

This is the piece in question: Bismuth