Lots of strange electrical issues. Could this be a flood vehicle? How many miles did it have on it when you bought your new 2018? Many new car dealer lots have been flooded in the past year. Dealers are suppossed to disclose about flooded new cars when selling them but who knows??? Especially the greedy ones! Maybe thats why they are ignoring your problems because they know its a flood vehicle?
There are over a hundred thousand flooded vehicles still out on the market nationwide. Both new and used. Lots of money to be made! Even if insurance writes them off as totaled, they still can show up at Auctions then make they way back to regular dealerships after full cleanup. Weird electrical problems are a telltale sign. Check inside seat tracks, under carpet, and under dashboard for sludge and sand traces, places the cleaners would miss. This applies to all brands, all vehicles.
Buyer Beware...
Aloha, HT