This bug is interesting. It works on alot of locomotives. I think what happens is the game gets confused with the camera changes so it tries to load the interior view. And for the p32 it's cab is the dd40xs.
I also found a bug! When you have the BN Shunter locomotive from the short line route and combine with your other shunter (the red one) they will be in each other
You can, if you play the first part of any session with the locomotive given, the game does a safe. And then after that first goal (objective) completion, you can spawn in anything with the session still in motion. Try it out it mocht be a personalized bug on my iPad.