Dealer finally got cameras in stock and replaced them, as well as electronic board. I don’t believe they touched any of the harnesses. They said a ton of 2020 Fords had camera issues (not just Raptors), and that it is a common and recognized issue. No issues so far - first time since I bought the new raptor that 3 days in a row both cameras work. Will report back if the issue resurfaces, but I am cautiously optimistic that it is fixed.