If i downgrade to System.Data.SqlClient 4.4.2 my application has no issue connecting to the sql server with hostname. So what change was made in 4.4.3 that could make me have these issues?

I'm running a console app (dotnet core 3.1) inside a kubernetes cluster (docker container). I can connect to the database using the server IP, but it fails using the hostname. The hostname is added on ...