I have had his issue before with other ships, and it was fixed. hopefully you will fix it again.
I just tried to customize (within the perimeters of the vessel) the T6 Anniversary Krenim ship. I put in the changes (Material, colors, and pattern) but the ship did not change.
i try to keep a certain pattern and color scheme 9again, within the perimeters allowed) on all my ships (My "livery" if you like) and would like to do the same here.