The helmet liner in question is not canon. It's never been seen in any star wars book, dictionary, or visual encyclopedia. I have the original prototypes and all the molds I've taken sitting in my office right now. I can name every part I used or built to make the prototype.
But I'm not claiming rights to the concept of a helmet liner that looks like "in-world" electronics and components. There are a number of other artists out there offering different versions of that same concept.
My problem is that the design that I created from my imagination is going to be a feature in however many thousands of these that they sell... But I don't get a credit, a mention, a nod, a thank you note...nothing.
Actually, what I do get is advice that I need to shore up my defenses and make sure my creative process was documented thoroughly because I may be accused of stealing their idea later on down the line.
That's not how this is supposed to work.