SSO logout not working: user remains logged in after /api/sso-logout

SSO logout not working.
Thought I'd check if i'm using it correctly before raising a bug.
Flow:

1. our frontend makes request to our application backend to logout.
2. our backend calls /api/sso-logout/?logoutAll=false and can see in the log that status: ok
3. our app clears its own session
4. i go back to our app to login, it takes me to casdoor and i see that the user is still logged in in casdoor
5. also, there is no logout-sso endpoint that redirects back to the app, so we can't redirect user's browser page to the logout page in casdoor

what am i missing?

this is what i see, i shouldn't be seeing the continue with option after a sso-logout

@k.mridul create a github issue