Floating windows and walls that desapear

Support Bug Reports
1

Summary:
I was building a tower 4 ffloors, When it builds the second floor lose it walls and the windows go outside into the “void”

walls are gone.png2560×1080 536 KB

Steps to reproduce:

  1. dont actually now how to reproduce

Expected Results:

Walls being built

Actual Results:

No walls

Notes:

I made some floor changes on this floor. Changed the color. The other floors look the same

Attachments:

Version Number and Mods in use:
develop-3349(x64)

System Information: