Broken clipping/ pathfinding makes Hearthlings literally take off

Summary:
Once in a while (twice a gameday), I spot hearthlings walking their way, then suddenly doing a sharp 90 degrees turn and literally taking off, flying upwards through cliffs, eventually landing at a random location or- more likely- getting stuck in the middle of the terrain, only their head sticking out. Without the teleport command, my hearthlings would have gone extinct.

Steps to reproduce:

  1. I have
  2. no clue
  3. at all

Expected Results:
Hearthlings properly calculating their way using the path finding algorithms.

Actual Results:
Magic.

Notes:

Attachments:
https://www.file-upload.net/en/download-13208170/StonehearthFlyingThroughWalls.7z.html
Version Number and Mods in use:

System Information:

3 posts were merged into an existing topic: Skywalking Bug (someone learnt how to fly)