As of right now we only support one exhaust style for the rocket engines, so this is not a bug but a limitation in the game currently. Feel free to check the suggestions page, there are some about the exhausts and if none fits your needs you can make a new one.
As of right now we only support one exhaust style for the rocket engines, so this is not a bug but a limitation in the game currently. Feel free to check the suggestions page, there are some about the exhausts and if none fits your needs you can make a new one.