Several bugs have been fixed.
Fixed a problem where zombies would lose track of the player's position when on a sofa.
Fixed the zombies walking in single file. The zombies now spread out to the left and right.
Fixed a problem with zombies going out of the map.
Removed the river to solve the problem of zombie dogs getting stuck in the river.
ver1.0.3 release small bug fix
Source: Steam Community (opens in a new tab)