Infected can get immune to vehicle attacks. (Desync is probable cause).
Having a tent in your hands and another tent of the same kind and color and placing that tent will get rid of the other tent in your inventory.
Sliding down a ladder and passing through another player will cause the sliding player to be launched into the sky, and fall to the ground, but took no fall damage. The other player that was climbing the ladder, sees that the sliding player was dismantled and fallen to the ground. (Visual Bug or Desync?)
Flagpole not protecting tents, barrels, wooden crates, and improvised shelters when there are more than 15 items were being protected.
Vehicle crashes at high speeds can make the player not take any damage.