So it's been a while since I played Sherman Hill on PS5. Today I decided I would attempt the Magnet for Trouble scenario. Upon loading the scenario, the loco and part of the consist are moving backwards as the brakes are fully released and you cannot operate the brakes until you have flicked all the required switches to on. Only then does the train decide to stop. This is a new bug to me and seems to have only started happening since the update to Sherman Hill.