My Seeker appears to be broken. It calculates a path, displays it, then suddenly veers off course and slams into walls that are marked as Unwalkable. If I move the target I can make the Seeker go through the door eventually, so I know it fits and the path shows it always tries to reach it.
Example gif: https://imgur.com/a/TUhEwzZ
It looks like your AIPath’s pick next waypoint distance field might be a bit too high. The path looks correct, but the agent is following the path a bit too loosely. See https://arongranberg.com/astar/docs/aipath.html#pickNextWaypointDist
That seems to have fixed it, thank you. Not sure when it got set to 4, but it looks like anything over 1 makes it go crazy.