Please provide a log screenshot of accepted traffic still being NATted to the old address, the log card will show the NAT rules involved. Keep in mind that after changing a NAT address only new connections will start using it, old connections will continue using the old NAT address until they end. Are sure you are launching NEW connections for testing and not still riding on old ones?
Attend my online "Be your Own TAC: Part Deux" CheckMates event
March 27th with sessions for both the EMEA and Americas time zones