Monsters keep attacking your Mercenary during the Grace Period

Normally during the Grace Period they ignore you and your minions, helping you to avoid getting swarmed upon entering or re-entering an area.

Mercenaries however immediately aggro the enemies and this can be very problematic, particularly when you enter the areas with many monster packs, for example Incursions. This leaves you with no time to check your surroundings and by the time you act many monsters are already pulled next to you.

While hired Mercenaries are not your minions, they also follow you and fight on their own and unlike other players can't intentionally lure the monsters away or wait until you are ready.