Dragon Necropolis trap spawned mobs do not reset to their spawn point

[Colgate 2.0]

if you spawn and aggro a dragon necropolis trap-spawned mob like a dragon construct, phase spiders, swarms of beetles, and carrion bats and move somewhere else and die/gate/FD, they will stay where you left them

i'm not sure if they eventually roam back after a long period of time or if they just stay there permanently