Hello Nicolas
Yes, I can see what you mean!!! I changed it for one product (we have over 3000) to check it out and it solved the problem. This is how it looks like in the cart.
Is there a possibility to (I am lighting it for reference as bold Characteristics) to show the label of the value as well which could be f.e. Color, Cover, Size etc. so it would look like:
Colour: Orange
Size: 12" 300mm
Also when the products in the cart are listed on the checkout the SKU (order code) is displayed nicely with the rest, see example