[CarolinaMopar]

I have had similar problems, except for cylinder 5. Replaced the spark plugs, worked for a while. Broke again, replaced the coil packs, worked for a few days. Broke again. Just found out there is a crack in cylinder 5, coolant has filled that cylinder, the engine is a loss. That will be $10,700 please. Ugh. Done. Taking the loss and getting the **** outta this thing.
Goodbye Chrysler Pacifica Touring 2017 😑

I'd replace the plug or plug and coil pack, whatever it takes to get it running again and then rush to a dealer and trade it off.

 

[CarolinaMopar]

How did they determine that the cylinder was cracked? Head gasket would be first choice and while they have heads off then inspect cylinder for a crack.