This is what was added to the Test Server last night. Please countinue to report and issues you may find on the Test server.
  • Vehicles should no longer sink into ramps,stairs and deck expansions
  • Fixed invisible zombies after being hit by cars on headshot-only servers.
  • Fixed interaction problems with BBQs and furnaces.
  • Fixed a bug with the direction of some melee particle effects.
Source: Reddit