The URL used in all store Control Panels will now reflect the store’s Permanent Address (i.e. store-abc123.mybigcommerce.com).
Previously, if a store had an SSL certificate installed, the store URL (i.e. my-store.com) and the Control Panel URL were the same.
We’ve made this change to secure stores and improve the reliability of the Control Panel. This change shouldn’t cause a disruption to stores.