Factorio Forums

Park train and car that is locked at all copper for the car. Put fast inserters next to the car with chests loaded with iron. Have everything powered. Change the car so it now only accepts iron. The arms may not wake up. This appears to happen on the 2nd car in a 2 car train, not the first one. Once you flip the inserter arm it start working and wakes up the rest that are feeding that car.

Could you add a screenshot of how you set up your unloading station?

I was not able to reproduce the problem, could you provide save where it can be reproduced?