monster stoped atacking

i was doing t15 3 times guilt enchanted riverside with boss and at some point monster stopped atacking me.

one reason why it could happen is i added some point on the boss atlas tree during run.

second reason why it may happen was usage of the omen of reasurance which bring back life when getting low hp.

i was able to kill mobs and boss and they were able to move but after certain point they never atacked again