0.95.11 construction site "lost" on save/load

[Mudkest]

I was building a turret on a roof and after a few save/load with squad reset I noticed the construction site was gone. But the character set as engineer still run over next to the building with a construction job, but then stand idle.
I have not been able to reproduce it.

Save file attached where the engineers still try to build it.

mods used, just 1: Tents https://steamcommunity.com/sharedfiles/ ... =722677433


https://drive.google.com/open?id=0B7kRd ... Hp0RDB1R1U