Player made walkways over player made walls causes the walls to randomly lose ability to block spawning/migrating zeds

[Jiffydude]

Version 41.78

 

Singleplayer, multiplayer unconfirmed

 

No mods

 

Occurs on new save

 

How to duplicate:

 

Build any player made wall, then build a walkway on top of that wall. With the zombie population map (ZPM) zoomed in to see pathing obstacles, you'll notice that building a player made floor on top of the player made walls, it will cause them to randomnly lose their obstacle status on the ZPM (Essentially building catwalks on perimeter walls).

 

Double building floors above player made walls will always duplicate this issue (building a floor on an already existing floor above a player made wall).

 

Verified that this will allow the director to spawn zombies into that area (or allow the pathing check through the gap), as if it's not walled off.

 

Currently unverified on dedicated/hosted servers, ZPM doesn't seem to show the same level of detail, no obstacles, can't force respwans (may be user error).

 

Found temporary workarounds for solo players:

 

1. Building a floor underneath the walkway resets it.

2. Placing items that act as barriers underneath it resets it.

3. Moving the player chunk away from walkway, then returning, putting it back in the player chunk resets it. While away, though, zombies can still be spawned inside, or migrate inside.

4. If solo, reloading game resets it.

 

Small issue, but thought it was worth reporting

[Jiffydude]

Update: This bug ONLY applies to catwalks build on the east or south side of a wall.

 

This bug doesn't happen when you build a catwalk first and then finish with the wall below it.

 

Building any fences on top of these catwalks seems to always trigger this bug.