I have been seeing this for a bit now, some of the buildings that are pasted in will randomly have wallpaers show up. Some but not all of these have been built in fortify and brought over but not all of them. I cna remove the wallpaper but later it just re-appears ??
Just curious to see if anyone else has encountered this.

I've had the same issue. Especially with raidable bases. If a wall gets damaged during the raid, a blue wallpaper appears

Chardazar

I've had the same issue. Especially with raidable bases. If a wall gets damaged during the raid, a blue wallpaper appears

Do you use TruePVE by nivex? He just updated that plugin to fix this issue.