I have a very similar problem. Mine seems to originate from the Detroit map piece just above yours. Very annoying. I also believe I'm hearing it on the passenger side.
I had them on my 2018 set at 1.75. It was the perfect height (slight rake) and never settled that I noticed. But to be honest they were a bit stiff for me. But you will find that opinions vary widely on that. I now have a 21 with very few options out yet.
If you notice the footnote in the guide, it limits the tow tech to 7000#. I did not notice it and I am fairly in tune to those things. And it is a real issue for me. The dry weight of my boat trailer is right at 7000. I don't pull often as it is stored at a marina. But when I do its a 2 hr trip...