[keycloak-user] Logout from external IDP, IDP doesn't support parameter forwarding

I added an external OIDC provider as IDP in my Keycloak config. I've configured all Endpoints including the Logout URL. Loogin works perfectly. However when I try to logout from the external IDP, I see this URL: <some_url>?state=9ef361c6-e94b-469d-8f72-cef2f374bff8&id_token_hint=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.ewogInN1YiI6ICJGY0otNm1pYnNEZ3ZmWnFFN2hpSVVQNnBWTGhfWWpSQ1dROFFoMXVUeE53IiwKICJhdWQiOiAiNzE3NTdhZTgtODE1MC00MTcyLTk3NmMtZGUxZDdmZTEyOGJjIiwKICJjX2hhc2giOiAicGZMTHh5YzgxRW1rOTVpYVd0WkFCZyIsCiAiYWNyIjogImh0dHBzOi8vbG9naW4uc2VjdXJlLm1lcmNlZGVzLWJlbnouY29tL3dsL2xldmVsLTE1IiwKICJhenAiOiAiNzE3NTdhZTgtODE1MC00MTcyLTk3NmMtZGUxZDdmZTEyOGJjIiwKICJhdXRoX3RpbWUiOiAxNTA0MTY0NTY1LAogImlzcyI6ICJodHRwczovL2FwaS1jZXJ0LXRlc3QuaS5kYWltbGVyLmNvbS8iLAogImV4cCI6IDE1MDQxNzE3NjUsCiAiaWF0IjogMTUwNDE2NDU2NQp9.cRCPjvjJxpnkDsDVcSF4jne5_5EwTgF2Hd1kglPLTsw&post_logout_redirect_uri=<...>%2Fauth%2Frealms%2Fmy_realm%2Fbroker%2Fkeycloak-oidc%2Fendpoint%2Flogout_response And then the redirect from the IDP <some_url>/auth/realms/my_realm/broker/keycloak-oidc/endpoint/logout_response The URL parameter "state" is not appended to the logout_response, but it seems to be necessary for keycloak to do the logout. Is there any workaround? Joerg If you are not the addressee, please inform us immediately that you have received this e-mail by mistake, and delete it. We thank you for your support.