I am having a similar experience. When I have clef active, the admins cannot login. When you go to our home page, when I had clef on…had to shut it off so I could login, the home page refreshes after clef does its thing, but once it is done…it does not refresh the login page and log me in. It just creates a loop.
Then when I shut it off, I had to send all my admins new passwords as they could no longer login.