The game crashes that have been reported by players on both consoles since the Heavy Freight pack was released, are still happening on some Trans-Pennine services, particularly, though not exclusively, the ones using the class 40. As an example, the 6E67 at 15:55 Manchester - Healey Mills Heavy Oil has crashed for me on every attempt. They always seem to occur around the Manchester to Miles Platting area. I have raised support tickets on this a couple of times, and provided video of it happening. Matt mentioned the bug on the TSW2020 pre-launch stream, saying that it should now be fixed, so I'm just posting here to confirm that it's unfortunately still there.
Just on the off chance that anything was fixed in the most recent update, I had another go at 6E67 15:55, and somehow it didn't crash this time. Very pleased, but... Later tried NH08 Van collection at 06:30, and yep, big crash again. So it's still doing it, guys.