Misconfiguration with Silk within Trains?

Good to know, I will skip those deliveries for now. I just collected 20 silk especially for deliveries and couldn't load them in the train, really annoying especially since it is worth quite a few points.  And I dumped items in there I didn't want to part with, because I forgot for a second that I can switch cars if you haven't loaded anything in the cars yet 🤦