Transparent autoracks

I have noticed that since the core update, the default kuju autoracks in the Seattle BNSF Sub have become semi-transparent. After checking some other routes, the problem is common throughout RW. The only route I have installed or modified since the core update is the Seattle Sub. I don't know if the the update changed something or if something in Ian Allen's asset packs was incompatible with the update. His assets worked fine prior to the update.
Is anyone else having this problem? How do I fix this?
Is anyone else having this problem? How do I fix this?