At the small regional bank I used to work for accounts were assigned a home branch, typically where the account was first opened, and that branch had enhanced responsibilities in terms of servicing and maintaining the relationship.
Chase is big enough that their KYC fallout queues probably have an entire team working them, and it wouldn't matter who else you CC on the email.
("Hey Joe, come quick! Just got an email from someone claiming they need their money we just froze...")