Pathfinding on an unloaded scene streaming area

Hi, I'm using scene streaming on a large map and I want an NPC to constantly navigate to the player, but sometimes the area they are in will be unloaded. If you ever played the Resident Evil 2 remake Mr. X keeps traveling to the player even when the player runs away from them, however I want them to constantly track the player instead of stopping sometimes. Any suggestions on how to keep pathfinding working on unloaded areas?