power shutoff doesn't always work properly sometimes.
reloading / restarting the game does not solve the issue, thus the failure is still present in the safe I added in this post. I Use the same system 2 more times in this save and there it does work properly.
rebuilding seems to change the state of the power shutoff. but it doesn't always start working properly after rebuilding.
no clue just came across it maybe the save helps.