Path Nodes.

[Your Computer]

The monster pauses at every path node because you told it to walk up to every path node (also, 0 doesn't mean don't waste any time on the path node). Don't use an entity collide callback, since the monster will still despawn even if the player isn't hiding or if the player is looking at the monster. Instead, make use of the Callbackfunc field for the monster in the level editor and check for OnAutoDisabled.