As you know, tinkering VERY LONG process!
If during this process dups go away (for examply for make breath, may be need use Power Control station at this time, or deliver microchips) this process fully reset, and microchips disapired, after it dups start process from ZERO.
So NOW tinkering fully BROKEN.
Steps to Reproduce
Just use save game. Before save process done almost at 10%, but after load it start from 0. Also if dups produce any microchip in Power Control station, process start from 0.
This issue has not been confirmed by a developer yet.