Hi Harry,
I'm sorry I didn't update this thread with the news from the related tracker issue I created.
You can find the solution here : https://tracker.moodle.org/browse/MDL-63482
Basically Paul Holden gave us the answer :
"You need to visit your Site security settings configuration page and tick the role name next to the Profile visible roles (profileroles) field (documentation here)
Students will only see those roles selected here on the course participants page"
I'm sorry I didn't update this thread with the news from the related tracker issue I created.
You can find the solution here : https://tracker.moodle.org/browse/MDL-63482
Basically Paul Holden gave us the answer :
"You need to visit your Site security settings configuration page and tick the role name next to the Profile visible roles (profileroles) field (documentation here)
Students will only see those roles selected here on the course participants page"
Regards
Cam