MS SQL Monitoring not working correctly on named instances
We've an applications Manager monitoring several SQL servers.
Whenever the Monitor has the option "Connect using Named Instance" (See SQL-1.png attached) the monitor will be unavailable most of the time, only being shown as available for 5 minutes or so (see SQL-2.png attached).
I don't think this is the servers themselves as my screenshot includes multiple servers with both named and default instances on it and only the default non-named instances work fine.
Anybody have any ideas?