SSO appears on supplier user sign-in screen (redirected) after 24A update

Summary:

After the 24A update, accessing the URL for supplier users redirects to a page with SSO on the login screen.

Supplier users are not using SSO. I want them to access the page without the SSO button like before.

Content (please ensure you mask any confidential information):

After updating 24A, supplier users accessing 1) will be redirected to 2).

1)https://{POD_NAME}.fa.{DATA_CENTER}.oraclecloud.com/supplierPortal/faces/FndOverview?fndGlobalItemNodeId=itemNode_supplier_portal_supplier_portal

2)https://{POD_NAME}.login.{DATA_CENTER}.oraclecloud.com/oam/server/obrareq.cgi?ECID-Context=1.0064m83rOrv3n3KMyUZf6G001akL0004jr%3BkXjE

23D environment is shown below