Hi,
It wasn’t a plugin or theme conflict. Seeing as each user is given a WP role and UM role, there seems to be some inconsistencies between the two. I simply changed the WP role to something else and the problem went away. I also realised that the test users were created thru the backend – this gave me problem but when I create users thru the front end (thru the UM plugin registration page) I have no problems. Maybe you should look into this?
Thanks