my switchtes change the behaviour of ajacent wire sections. On Load of the game or on using the switch in permanatly changes to a state where the current and max circuit status is set to -1 W. The wire then wont connect ajacient wire sections no matter of the state of the switch. Even deconstructing the switch wont change anything. Only deconstructing the bugged wire sections and reconstructing them will allow for a working power circuit.
Just build a power curcuit with several consumers, and seperate some of them by switches. Then save and load, or just turn the switch on and off.