I think I've accidentally created an account via my gmail account and now I keep getting auto-logged in on the homepage.

My actual account is via facebook login, but whenever I visit the homepage, I get autologged in via the google sign in. I log out by clicking "Log out" on the top right, but I just get autologged in again and I can't log into my real account unless I sign out of google or visit from an incognito tab.

How do I delete my account via the google flow or how do I stop autologging in from the homepage?

This has been really annoying and only started happening ~2 days ago for me. Not sure what changed.