Nostalrius Begins - Quality wow vanilla realm (1.12)

Since day 1 of my time on the server, I've noticed something weird, the mobs are hostile for a minute, and when I go closer, they're friendly. It's weird, could you fix it?

Yeah sometimes when you're in range of a player's pet, but not the player, then the pet is seen as hostile until you're in range to load the player in.

Did anyone report this bug on bugtracker? It's still there, pretty annoying