Zombies spawn in base?

[kaylo7]

Came back to base after a little over a day in a nearby town. Returned to find multiple zombies inside my base, inside fenced off areas. Never had this issue before. Only difference this time around is that I'd killed a lot of zombies (don't normally do that), maybe between 50 and 75 of them. So this might have forced zombie respawn of surrounding cells, causing zombies to spawn inside my base. I did a walkaround and confirmed no gates/doors were open and no walls were broken.

Thankfully caught them before they broke through the inner gate to my house (generator on 2nd floor porch attracted them), but want to avoid this happening again. As far as I'm aware, game mechanics prohibit spawn inside 2-high fenced in areas. This is an old save and has been updated through mulitiple game versions. So I'm wondering if the wall detection broke somewhere along the way.

Is there any debug option to check if an area is considered fenced in by the game engine? Something I can check with -debug launcher?

As you can see, the entire thing is fenced in (yes, it took forever which is why I keep playing an old save).
Front of Base:
https://steamcommunity.com/sharedfiles/filedetails/?id=2769020771
Back of Base:
https://steamcommunity.com/sharedfiles/filedetails/?id=2769020808
Middle Connecting Road:
https://steamcommunity.com/sharedfiles/filedetails/?id=2769020837
Front of Auto Shop:
https://steamcommunity.com/sharedfiles/filedetails/?id=2769020854
Back of Auto Shop:
https://steamcommunity.com/sharedfiles/filedetails/?id=2769020877

[Bucket]

Same issue here. Zombie spawned underneath some stairs in an area completely closed off (I cant access it without a sledgehammer)

[carl]

Ah I know you can prevent this from happening if you disable zombie spawns on the sandbox gamemode, though overtime it has the risk of making your game a bit more boring

[kaylo7]

Originally posted by Bucket:

Same issue here. Zombie spawned underneath some stairs in an area completely closed off (I cant access it without a sledgehammer)

Was this a vanilla structure? Zombies can spawn in enclosed spaces on world creation, but after killing them they won't respawn if the area is fully enclosed. I'm talking about player-built, already cleared areas spawning zombies despite the area being fully enclosed by a double-height wall.

[Shady Allie]

you are also using mods. mods change the way the game works and if something works in unmodded, it may not work as soon as you add modifications to the default files.

just keep that in mind when trying to troubleshoot issues.