It's a known problem with new FCA vehicles.
I traded my 2018 Pacifica because of that and my Ram did the same thing pretty much since day 1.
I visit the dealer every few months for this reason.
I actually went to the dealer to address this today and scheduled an appointment for next Friday. I will probably have them re-charge the system and clean the AC radiator from bacteria.
When my service adviser smelled it his reaction was so funny
"Dude, IT SMELLS LIKE BUTT", His words.
I think the system is undercharged from the factory and that's what causing this issue.
Will keep you posted.