On the map Temple of Hamura set bomb or trap near bosses it makes enemy AI gather there and don’t do anything until players come nearby. They keep switching between attack boss and fear the trap in the loop.
It isn’t your spell that is causing it, but rather faulty artificial intelligence scripting. On many maps they will blindly beeline as a full team towards certain locations whenever you decide to solo a mercenary camp. Skynet can somehow tell your every move ahead of time, even through fog of war.
This flawed behaviour is more than a year old and this isn’t the first time someone is complaining about it. Blizzard even mentioned fixing it, when in fact it wasn’t.