Thank you for the solution but I'm still curious for the reason behind it this didn't happen before like a month ago maybe two, I have been playing on default settings and it just suddenly decided to make the zombies all clumped up I was thinking maybe an update changed the cluster sizes or something?
When I host a game with my friends, it always seems like all the zombies are in big clusters, really close to each other, and I haven't seen any spread out zombies, how do I fix this bug, please help.