So I've made many prefabs in alpha 18 and when I tried to make my first one for 19 I quickly realized that the sleeper volumes are broken. I cant adjust them using shift+g or even use g to move it around, making prefabs damn near useless without being able to add zombies to them. Maybe I'm missing something and the keybinds are changed somewhere I'm not sure. I've already went in and adjusted the XML for sleepers and its not working.