as far as i know ... petattack is like assist pet owner.. (if you stand in a grp of mobs the pet knows which target it has to attack, your target, else the pet were not the usefull for hunters und wls)

so the problem is when your alt shortly has nothing in target ...

so the voids go crazy

maybe try with direct targeting .. like mentioned abouve or bind a key for passiv mode of the pets .. and call them back if needed