Thank you for reaching out! We would be happy to look into this further for you. In fact, where are you trying to make this update? In your email footer or the organization address in your account settings? Are you seeing any error messages?
I was unable to replicate the same experience when testing the physical address in your email footer. you can see this address change through the support copy available in your account. Because of this I would suggest trying to make this address change through a different browser or even a private/incognito window. Are you able to make a change to your physical address in a different browser?