False, Asus is breaking the law. They have no legal right to void your warranty or take any legal action for using third party parts or software.
https://arstechnica.com/tech-policy/2018/04/ftc-warranty-voiding-language-like-nintendos-and-sonys-is-illegal/...
I tried all that and a wired connection. It's a 68U. I've been using Merlin firmware since it was first released for 66 and this has never happened before.