securityContext.userInRole returns false despite user having the role

Via a Structure sandbox, we created a new page entry that will take us to a BI dashboard. We wanted this icon/dashboard to appear only for one particular custom role, so we used an EL expression like this:

#{securityContext.userInRole['XX_TRAINING']}

I can confirm that the this is correct role name and there are no spaces. The role is assigned to few users and when I logged in as that user, I don't see the newly created icon at all.

Our custom role category is 'HCM - Data Roles', if it matters. We have also run Regenerate Data Security Grants process, LDAP process & Import User and Role Application security processes after creating the role & assigning it to users.