Really wasn't hoping to revisit this thread. I have a 2020 that I bought brand new, well wouldn't you know it after ~ 5years and 52,000 miles, discovered mine is leaking this weekend. Couldn't have happened under warranty when I was keeping a closer eye on it after discovering this thread 5 years ago...
My son was sitting in the back and noticed the headliner is stained from past water leaks. After looking closer, there are cracks all along the plastic trim piece in 3-4 different locations with water stains where it has been dripping down...
I was contemplating taking it back to the dealer and having a new window installed, but sounds like I should try the SEM leveling sealer and 3M strip caulk fix mentioned in this forum by Leevons DIY post. Since they still haven't changed the design.
Shocked, not shocked to see this is still an issue with the newer trucks.