@UserRoles show only $$WebClient

We using a customization for iNotes va “Forms9_x.nsf” as described here: https://www.ibm.com/support/knowledgecenter/SSULMR_9.0.1/admin/conf_customizingthelookoflotusinotes_t.html https://www.ibm.com/support/knowledgecenter/SSULMR_9.0.1/admin/conf_customizingthelookoflotusinotes_t.html
This customization worked fine until you updated to FP7 IF1 and it uses the roles in the database ACL to allow and show certain features.
Within the Forms9_x.nsf and in the subform l_MailMemoEdit we added a row to show the roles: Test:@{@UserRoles}
We also tried with @{@Implode(@UserRoles;“,”)}, but only $$WebClient is returned.
@UserNamesList. doesn’t work, no role is returned, only Names
@UserRoles - User has one Role

Therefore the “role” is never applied and the customization does not work anymore!
As a workaround you use Form9.nsf and Form9s.nsf from FixPack 6 - which works fine again.
We now know the Standard-Mode is default with FP7 - so only the Form9.nsf is ulitzed and we deleted the Form9s.nsf also removed the “defaultForms” parameters from the notes.ini. But the behaviour remains unchanged.

Has anyone else encountered this issue or has an idea how we can get this to work again with FP7 IF1?