The loading station n°1 (on the left) is empty and subsequently, the filling hose is retracted, which is expected. However, the station n°2 is full of product and despite the filling hose is connected to the same wagon than the n°1, said wagon do not get filled, which block the train for depart since my train departure condition is set to "Full of dispended product".

Here is the same station with corrected view angle and with the train infobox
