Undo breaks tread generation

Using undo continually disappears the treads around the roadwheels and idler.

Screenshot

Screenshot

System Info 
Game: v0.71.6 | WindowsPlayer | Windows 10  (10.0.19045) 64bit
GPU: NVIDIA GeForce RTX 2060 (5954MB) | RAM: 32725MB
Display: 1920x1080 @144 Hz [window size: 1920x1080, DPI: 96] | FPS: 70

Submitted by: DrifterAlgier