Train Sim World 3 Cajon Pass - Co-driver/engineer Appearance Changes Randomly

In Cajon Pass, I have observed this glitch, where the appearance of the co-driver (not sure of the correct term) changes randomly when switching between outside and inside cameras.
To reproduce:
- Run a Cajon Pass scenario
- Switch to an outside camera (e.g. press 2)
- Switch to the end of train perspective of the same camera (press 2 again)
- Switch back to cab perspective
The appearance of the person in the other seat will have changed.
Pretty sure this happens in Sand Patch Grade as well, will confirm shortly. I don't own any other US routes.

 

I think it happens on all US routes

 

I never said it had to do anything with 'the patch'. To me this is a glitch, and I have observed it in TSW2 as well. I understand the technical explanation for why it is happening, but it is still a glitch that reduces immersion.