You’ll probably find this is the case with any saved game when you resume. It’s a problem that’s been going on since TSW was a thing
Save game is not worth the trouble in its current form. It's reliability is terrible. That is a great shame because most runs are over half an hour to an hour in length. If I know I can come back to the machine on the same day I leave it on pause then let it go to power save mode (PS4) it starts back up perfectly.
I have the same issue on Peninsula corridor and Ruhr-sieg Nord (I don't have the Tees Valley), looks like to be a widespread preserved collection issue. I have reported it some time ago, so I'm curious if the next batch will contain it as well. The bug is only present in preserved collection in TSW2, and all those tracks works well in TSW 2020.