Unable to setup multiple SAML authentication domains

[lrybak]

Describe the bug
I'm unable to setup multiple SAML authentication domains

My setup:

• Two IDPs providers
• One OpenSearch cluster
• One OpenSearchDashboards instance

I would like to achieve the goal of working two (or more) IDPs towards single OpenSearch Dashboards instance.

I have configured two SAML authentication domains on opensearch (saml_auth_1, saml_auth_2).
SAML authentication is working fine with any domain having challenge set to true regardles its order number (order: 1, order: 2)

When try to authenticate with other domain having challenge set to false, SAML authentication is failing.
According to my observation SAML response is always validating domain with challenge set to true only.
Can you please help me if I am missing any configuration?
Is OpenSearch/OpenSearchDashboards supports multiple SAML authentication domains at all?

To Reproduce
Configure two IDPs and Dashboards as mentioned in the sample config files.
Setup challenge of first domain to false and true for second domain.
Authentication does not work for first domain (idp1)

Expected behavior
If authentication fail for saml_auth_1 it should verify next authentication domain saml_auth_2

Plugins

es-node-3-t opensearch-alerting                  1.2.4.0
es-node-3-t opensearch-anomaly-detection         1.2.4.0
es-node-3-t opensearch-asynchronous-search       1.2.4.0
es-node-3-t opensearch-cross-cluster-replication 1.2.4.0
es-node-3-t opensearch-index-management          1.2.4.0
es-node-3-t opensearch-job-scheduler             1.2.4.0
es-node-3-t opensearch-knn                       1.2.4.0
es-node-3-t opensearch-observability             1.2.4.0
es-node-3-t opensearch-performance-analyzer      1.2.4.0
es-node-3-t opensearch-reports-scheduler         1.2.4.0
es-node-3-t opensearch-security                  1.2.4.0
es-node-3-t opensearch-sql                       1.2.4.0
es-node-2-t opensearch-alerting                  1.2.4.0
es-node-2-t opensearch-anomaly-detection         1.2.4.0
es-node-2-t opensearch-asynchronous-search       1.2.4.0
es-node-2-t opensearch-cross-cluster-replication 1.2.4.0
es-node-2-t opensearch-index-management          1.2.4.0
es-node-2-t opensearch-job-scheduler             1.2.4.0
es-node-2-t opensearch-knn                       1.2.4.0
es-node-2-t opensearch-observability             1.2.4.0
es-node-2-t opensearch-performance-analyzer      1.2.4.0
es-node-2-t opensearch-reports-scheduler         1.2.4.0
es-node-2-t opensearch-security                  1.2.4.0
es-node-2-t opensearch-sql                       1.2.4.0
es-node-1-t opensearch-alerting                  1.2.4.0
es-node-1-t opensearch-anomaly-detection         1.2.4.0
es-node-1-t opensearch-asynchronous-search       1.2.4.0
es-node-1-t opensearch-cross-cluster-replication 1.2.4.0
es-node-1-t opensearch-index-management          1.2.4.0
es-node-1-t opensearch-job-scheduler             1.2.4.0
es-node-1-t opensearch-knn                       1.2.4.0
es-node-1-t opensearch-observability             1.2.4.0
es-node-1-t opensearch-performance-analyzer      1.2.4.0
es-node-1-t opensearch-reports-scheduler         1.2.4.0
es-node-1-t opensearch-security                  1.2.4.0
es-node-1-t opensearch-sql                       1.2.4.0

Screenshots
N/A

Host/Environment (please complete the following information):

• opensearchproject/opensearch:1.2.4
• opensearchproject/opensearch-dashboards:1.2.0

Additional context
opensearch_dashboards.txt
security_config.txt