The Bug
A silverfish that has a name, then infests a block, when it comes out it has no name anymore.

Replicate

• Name a Silverfish Spawn Egg
• Place a block that Silverfish can infest (like stone or stone bricks)
• Spawn a lot of Silverfish (One will eventually infest the block)
• Once it infest the block break it
  (x)Silverfish no longer has its name