I get to be the a good new messenger today. We have made changes to the SQL Server Client Provider. The provider detects when multiple IP addresses are present for a listener.
The links below detail the behavior making it easier for your multi-subnet AlwaysOn deployments.
Improved MultiSubnet Listener Behavior With Newly Released SQL Client Provider in .NET 4.6.1
.NET Framework 4.6.1 is now available!
Bob Dorr – Principal SQL Server Escalation Engineer