Other Amfleet Cab Car In Livery Designer

I recently bought the NYC-Trenton route in the a sale but found the Amfleet Cab Car is still not functioning with the livery designer properly, retaining it's default in-game Amtrak textures. Meanwhile every other piece of stock in the dlc works fine.

This has been an issue with this piece of stock since launch, as I understand, and I would hope it's on a to do list to sort since I would like to make designs for it. I'm probably not alone in that.