Not sure if it's following the recent changes or not, but the Medic Kit item has purple/black textures on it;
Legit didn't even notice until I saw this post. But the thumbnail for me has ALWAYS had the texture spots, just not the actual model in-game.
It seems to be map dependant in all honesty, usually where it hasn't been sealed correctly. If you can confirm this is on every map, I'll look into seeing what is potentially missing.
It seems to happen on all maps, although I joined DR and the Moth Wings and Medkit were both fine, so not sure if just need to copy something from DR.