I don't know if this because of Valve's update or something, the easter egg's Gnome keep shaking then buried itself in the floor or disappeared inside a wall every time, after I throw it away for shooting zombies. This is annoying so much, a combination between a very long (and unnecessary) map for each chapters and this buggy issue make me losing the Gnome so many time.
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1457551657
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1457556538

This issue need to be fix real quick.