Could not change URL on Hass Gestalt

I would like to change url in Hass Gestalt; however, I couldn't delete or change the existing url that I put in before. I pressed the logout button and nothing happened. Even I reinstalled the app, the existing url is still there. Any suggestions?

Start by reproducing the URL and logout behavior in Hass Gestalt, then trace where the existing URL is retained across logout and reinstallation. Done means a user can delete or replace the saved URL and the logout action behaves as expected.

Written by the indexing model from the issue text.