Thralls falling into foundation blocks on ground floor

PC

Platform: PC
Game mode: Live
Version: 94750/17645
Problem: Bug
Crash dump link: (if applicable - fill out the crash report and enter your email to get the link)

Free text
Placed archer thrall keeps falling inside foundations through several floors. Placed successfully on roof of six story building. Return home to find thrall embedded inside a foundation block on ground floor.

Repro steps:

  1. Place thrall on roof of building.
  2. Go away for 5-10 minutes then return home.

Building was tier 1. Each floor was two stories.

And my danse thrall was walsong out of the bulding thru the wall and found hear under the water in the starting area.