Perfectly normal. The green led indicates 100mbps data speed. You reach a fraction of that with the air mixer. So it will never come on. Although it is not needed it's still there because it's a typical ethernet connector which all have them.
I can tell you that as a dealer I can see the distributors stock. There has been zero in stock since the first batch went out. And where they usually list the amount expected and when, that part has never been there since then as well. I really have no clue as to why.