The new Legacy boards are all new to accommodate Lionchief and Bluetooth. I am in the camp of if its not broke why fix it. These days newer is not always better.
Well I don’t know what the cost is but if this noise is so annoying, I’d consider bucking up and buying the previous board before it’s not available to replace the problem board. (Lionel at least could offer these AT COST !!!!!! ) These E8s aren’t Lionchief and I can’t imagine everyone wanting Bluetooth (lost of “old school” out there yet)