Arakaal's Fang Spiders do 0 damage going into the Mirage

When entering the Mirage or Abyssal Depths the spiders will follow me though but will do 0 damage. The only way to get around this bug is to unequip then re equip the dagger and summon the spiders again. Once leaving the depths and mirage this has to be done again.

Bug Reference number: 3883,312,203