I'm assuming that as a 2019 model, this is something that has happened recently? Is it dependent on any road condition? eg: Snowing, Foggy? Visors Down, Visors up, Daytime, Nightime? Certain Speeds?
Also I'm sure the dealer has done this but it may be worth asking them if they've been through this entire flowchart that is in the pdf and double checked if everything is mounted correctly, especially if they have replaced any parts.