Nostalrius Begins - Quality wow vanilla realm (1.12)

As the title suggest, the issue here is that certain mobs within the Palemane Rock, located in Mulgore, has this visual bug that seems to make enemies invisible, and that when you step in a certain spot, they randomly appear, and seconds after they dissapear out of combat. It would be nice that this problem finishes soon enough.

Kind regards

Nelthion.