large quantities of enemies/creatures spawning in newly generated zones

[ThrowTheCheese]

when entering unexplored zones, abnormally high amount of enemies are present as if their groups/squads have been spawned multiple times

so far only occured in special areas - the rusted archway and legendary lairs, regular zones have 1-5 mobs total

maybe worth mentioning i am using a low-end pc, will provide specs if nessecary