I have a bad navtv unit, after about 40 mins or so I get some static in the system, it goes away after I shut everything down for a few minutes. I messaged the navtv support team and they asked when I bought it, I said 4/10/20 he said it needs to be exchanged. I had to buy a new one and then send the old one back for a refund. Hope that corrects it, $600 is alot to spend to on something that isn't perfect. But if you want to play with the newest tech, you have to be willing to work through some bugs.
Ill keep you guys posted.