My population has two CP : form and CAS. I'm connected with CAS, when I click on "logout", and in the result page click on reconnect, I'm automatically reconnected without asking me which CP I want to use to login

Then I went to myCasUrl/logout, successfully logout, refresh the CMS...I'm still connected ! I had to click on logout on Ametys.

As a conclusion, to log out, I had to click on logout in Ametys AND call the CAS url logout