[2.0.72] Bot built trains sometimes do not start automatically

[fall guy]

sometimes when blueprinting trains and allowing construction bots to build them uninterrupted the train will remain in manual mode instead of entering automatic. this is rare but seems most common when printing a train on curved track. a save file has been provided, when pasting the blueprint with the 2 1-1 trains near the top of the curved parallel tracks the trains do not enter automatic mode after being fully built.