Clearing up the zone from lunatics after dealing with the ones at the entrace i decided to do a quick save.
rightly after quicksaving and progressing further i got ambushed by a stealthed lunatic and had to reload.
but after i reloaded, to my surprise the lunatic beamer respawned exactly where he was.
Pictured is a newly spawned beamer standing in a tile with 4 more beamer's corpses.