The obvious question here is how did you get it submerged in water in the middle of Arizona?
Have you ever gotten stuck in the snow in Florida?
Seriously though, this is how my truck performed BEFORE the PCM Flash.
The dealership should be aware of the update for this but if they are being stubborn/lazy (like my dealership) you will need to find the report (someone posted it here) print it out and take it to the dealership.
Tell them what you are experienceing and then show them the star report that chrysler claims will address it.