SAML problem: Invalid issuer in the Assertion/Response. Was 'https://keycloak.my-solution.net/auth/realms/infrastructure', but expected 'keycloak'

I have a freshly installed SonarQube 8.5 on Kubernetes without any plugins.

I am trying to set it up with our KeyCloak instance and followed the SAML Authentication from your documentation Delegating Authentication | SonarQube Docs .

When logging in with correct credentials I get the the error:

[c.o.s.a.SamlResponse] Invalid issuer in the Assertion/Response. Was ‘https://keycloak.my-solution.net/auth/realms/infrastructure’, but expected ‘keycloak’

This is my configuration in SonarQube:

Do you have ideas what may be wrong in my setup?