Bracking Roof Parts

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

After i logged in the roof of my building brake apart .
2 ramp brake without reason!
I often hear branking parts at the login but its the first time parts are realy broken.

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Steps on how to reproduce issue:
1.use ramps as a roof
2.loggout and loggin