As i was going into one of the spawn points looking for a chest, enemies appeared, took them out, then immediately more enemies re-spawned.
I took the 2nd wave out, then another. Multiple waves of enemies kept re-spawning wave after wave. No delay at all.
As more waves appeared the enemies were higher in level with ultras and majors.
Eventually i had to move away from the spawn door to prevent death, after clearing the last wave the re-spawning stopped.
Anyone ever come across this? Got excited at first, thought it would be a great way to farm if people know how to replicate it.
Two things I noticed.
I must kill all the enemies before they can exist the spawn room.
I must stay right in front of the spawn room.