A converting mob is always placed in the second slot after converting. (This means if the mob was already there it won't switch places so the order of my reproduction steps is important)

Steps to reproduce

• Place a boat
• Put a villager inside
• Put a zombie inside
• Wait for villager to convert

Observed Results

• Zombie and Zombie Villager switch places
  boat switch.mp4

Expected Results

• The mobs wouldn't switch places