Hello! we are setting up SAML auth via KeyCloak and all works fine (provisioning, sign in and sign out) except Auto-logout.

Steps to reproduce:

1. Login via SAML.
2. Wait for Auto-logout.
3. Get error like this:
   
4. Refresh page and get this:
   
5. Click "Login" and you will be moved to default login page.
6. Click "Sign in with Single Sign-On (SAML)" and get this:
   
7. Click "Login" and then "Sign in with Single Sign-On (SAML)" again.
8. Get profit - you are signed in.

Result:
Seems Auto-logout do not send logout request to KeyCloack and have some other bugs.
Expected:
1. Correctly ended session on Zabbix and SAML sides.
2. Ability to customize (hard customize) Auto-logout options in global settings.