Struktur Stability lost . Diagonal Support Beam has no Funktion

Game mode: [Online | Singleplayer]
Problem: | Bug | Performance |
Region: EU

My Pyramide ist destroying itself. .
The reason ist that the Diagonal Support Beams (Diagonale Stütz Balken ) dosent work any more. They dont give any Stability to the next Buildingpart.
Now its Impossible to rekonstruckt my Base. And my Bridge.
Destroying the Diagonal Support Beams dosent Change anything.
Please fix this.
[Free text]


Steps on how to reproduce issue:
1.build a Wall and a Plate. Wall hase 100% the plate 80%
2.build a Diagonal Support Beam between them
3.see the Wall hase 100% the plate hase 80%
4.Diagonal Support Beam has no Funktion anymore