Engine exhaust gas colour bug

When switching fuel types for engines in symetry, the colour of the gasses does not change with the fuel type for the other engines in that symetry

1. add an engine (one I used was full flow) to a symetry of 2 or more (im not sure if mirror experiences the same bug)
2. change the fuel type
3. select the other engines and the colour will not change

Image is usless since you cannot select parts when taking photos in-game
I did check if the engines were still in symetry, they were still in symetry

Fuel type still changes so this is purely visual