On east coastway if you create a scenario it will want you to open the wrong doors so for example if I was at Falmer going to Lewes it only let's me complete the load passenger's task if the right doors are open but the platform is on the left
I get exactly the same on a random assortment of stations on East Coastway, Rapid Transit, Bakerloo Like and Köln-Aachen. It’s really annoying but it only seems to be when using a scenario made in the scenario planner.