This has persisted ever since the first version of patch 1.8.

It will generally happen if you place over a certain number of parts on a ship in the ship designer. The textures on several parts stretch from and connect to random components on the ship model and when you exit the ship builder and start it again completely random parts are missing. I have some awesome looking ship designs that have around 100 components (that includes extas and functional ones), but when I use any of the 1.8 builds literally half of the actual models are invisible. The ships will also have missing parts in the galaxy view too.

Plz fix this it is verry annoying.

I can provide a few of the ship models and some screenshots if necessary.