Hi, it's not a bug, its a feature.
It used to be a bug, indeed.
After migration to the new design, I've dropped the part of code which allowed trusted artists to see each other's works. This issue was reminded to me, and it was reverted back the way it used to be about a half an year ago.
So, now artists (trusted, who did enough artworks with our members) could browse all old artworks, but not the ones initially paypall-protected.