Streamlit_ldap_authenticator wait times

I have an app that uses the streamlit_ldap_authenticator component and it works well locally. If I deploy to a docker container on an EKS cluster I start getting odd behaviour.
If I access the app using a mapped URL it reports an issue with loading the streamlit_rsa_auth_ui.form.rsa_auth_ui component. If I use the IP address as the URL then it successfully runs “user = auth.login()” and gets user data from AD. However, it then gets an empty results set from “user_groups = user.get(‘memberOf’, )”
Given auth.login is working I can’t see what the problem is with user.get. I wonder if it’s a performance related issue. Any ideas or suggestions on how to pursue this would be very much appreciated.