Hearthling cannot path to item, stuck standing around

Summary:
When an item lies below a low hanging wall, and a hearthling has no way to reach it, they will simply stand around doing nothing.

Steps to reproduce:

  1. Build a low-hanging floor
  2. Put an item below the floor, for example by placing a container and then removing it
  3. Wait for a Hearthling to pick said item up - They cannot reach it

Expected Results:
The hearthling will do something else instead or a Sims-like icon will appear above their head - β€œI cannot reach that item!”

Actual Results:
The hearthling stands around, dumbfounded

Notes:
I have 32 Hearthlings (limit 50) and disabled the item limit.

Also, one of the hearthlings just went to get food, so they are apparently not stuck there forever.

Also also, I just removed the building to free my poor hearthlings. I no longer need this building. This is what happened:

release-707 (x64)[M]
...ices/client/renderer/construction_render_tracker.lua:265: attempt to index a nil value
stack traceback:
	radiant/modules/common.lua:245: in function 'report_traceback'
	radiant/modules/common.lua:256: in function <radiant/modules/common.lua:250>
	...ices/client/renderer/construction_render_tracker.lua:265: in function 'fn'
	radiant/modules/events.lua:288: in function <radiant/modules/events.lua:285>
	[C]: in function 'xpcall'
	radiant/modules/common.lua:265: in function 'xpcall'
	radiant/modules/events.lua:285: in function 'trigger'
	radiant/modules/events.lua:370: in function '_fire_async_triggers'
	radiant/modules/events.lua:445: in function '_update'
	radiant/client.lua:44: in function <radiant/client.lua:39>    

The building is gone though, so that’s good. Everyone is unstuck and healthy.

Attachments:

Version Number and Mods in use:
707-x64
Terrain colour mod

System Information:
Windows 10 Educational, GTX 1080, 32GB of RAM

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