Anyone know an easy way to keep it matching domains when the subdomain changes? eg: account.domain.com changes to signon.domain.com at some point and it stops

Anyone know an easy way to keep it matching domains when the subdomain changes? eg: account.domain.com changes to signon.domain.com at some point and it stops matching. I've gone in and saved some accounts as just domain.com to prevent this, but when creating new passwords/etc, it always adds the current URL and the problem happens again after some time. Thanks!