The quadavs will aggro without you hitting them, if you're within 8 yalms on the z axis too.
A wall in between you and the mob on the Z axis doesn't block aggro the way a wall on the X or Y axis does.
Mobs can also just run through walls basically anywhere - use a teleporter in Riverne or sky when you have aggro and the mob will still get you, even if it means running across open air, lol.
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