Currently, the Login page makes use of the SOLID server URL provided by user if not logged in. However, if a webId has logged into the app, the Login page ignores the provided server URL.
For example, suppose a webId associated with server SERVER_A has previously logged into the app, thus the app caches the login details. Now a user restart the app and provides SERVER_B on the Login page, and click the login button, the app then directly logs into the app using the cached login details. However, it seems more appropriate to redirect the user to the login page of SERVER_B in this case.