Possible Bug: purchase.delivery-customization.run not firing after address change

[allanemerson]

We have a function that hides all shipping methods when the user enters a PO Box. purchase.delivery-customization.run fires correctly on load, and again if the PO Box is added to either address field, which shows the expected "Shipping not available" message. However, if the user then edits their address in any field, purchase.delivery-customization.run is not firing to update the methods again.

My guess is this is because checkout is in a state of "no methods" so customizations don't need to run? Can anyone confirm?