Dror was in a fierce fight against Major Ryker.
Ryker had already noticed that something was wrong and this was an ambush, when he received Mr. 18's spiritual message for help, but by that time he was almost 1300 meters away from Mr. 18 and the Barbarian turned around to take the golem form to engage him.
Mr. 18's fight happened almost at the periphery of his spiritual sense so he was not able to carefully observe theĀ battle while engaging with Dror and then all of a sudden the fight that was going on in the distance stopped and he couldn't sense Mr. 18 anymore.
Ryker had tried many times to lead the fight back to where Mr. 18 was but Dror was like clingy chewing gum and stuck with him and delayed him.
Dror received Xeanders spiritual message.