I didn’t want to report this as a bug immediately because I don’t know if it is a bug, but for Spireside-13 (the one where you need to break into the vaults to get the plague samples), after the event with the big skull spire cypher hack, at least on Heresy difficulty you end up with 6-9 poxwalkers/little guys CONSTANTLY spawning out of rear doors and such right up until the vault event. As far as I can recall it happened every time I’ve done the map (so at least ~15 times).
Does anyone know if this is an intended feature of the level, or some sort of spawning bug?