any Barracks towers that spawn soldiers or so will cause defeat if they touch where the enemies spawn, that includes towers like "Grim Cemetery" , "Orc Warriors Den", "Dark Knights" & "Elite Harassers".
So long as they touch where the enemies spawn, you will instantly lose.
I don't believe this to be a bug of the official game, I believe this to be a bug with the cheat itself because how could they have let such a bug through for the game ?
So if you have a Barracks tower near where enemies spawn and the soldiers move up towards where the enemies spawn, you will lose.
Its happened to me with "Grim Cemetery" a lot, the zombies spawn around randomly, sometimes very close to where enemies spawn, then they move up to intercept enemies and you will lose!
Once I was setting up multiple grim cemetery before i even started the first wave & I let the zombies spawn in, and one of them spawned past where the enemies spawn and I lost without even starting yet.