Failed LDAP authentication does not capture user id

I tried 1.19.0, but had to rollback as we ran into a major issue. We started getting Index not found error, when running queries from Kibana for all queries. We have LDAP rules setup for users.Typically, we would get a prompt for user to enter the user id/pwd. But after upgrade to 1.19.0, we are directly getting “index_not_found_exception”. In the index name, we see that index name is different than what we are querying. If we ran GET on myindex/_search, then the index name would show myindex_ROR_cRx35NQiOa.

We are using 7.2.0 on Windows 2012 R2, running default JDK.

Thanks!