Bug! Making a carbon copy clone using the design new trim function / dropdown box bug

[Seaswolf]

Making a carbon copy clone with a different marque using the design new trim function / dropdown box bug:

Sometimes you can click make new trim, click build and change the marque from lets say GM to Opel, click build again and you have a copy.

Other times when you try to do the same. Click new trim, click build and try change the marque. Only one marque (GM in this case) shows in the dropdown box.

Go change the paint or something and then both GM and Opel displays in the box.

I can not reproduce this consistently, it just happens randomly during gameplay.

I had this very same issue.
But I was too busy to write down very detailed as you did.
If Eric can track it or review for 1.19 would be great!