SSO Url unsets user attributes

[ejvlf]

Hey,
So, we are using the API to dynamically set some user attributes that change inside our application. After that we generate a SSO URL without user attributes param, that when it gets called resets the user attributes we've previously set. This causes the models to fail as the required attributes are not set: We can see the dashboards but their generation fails because of the lack of attributes. Do I need to add some parameter to the SSO Url so the attributes don't get unset?
Thanks for the help!