Advanced Alerts - emails failing to send

Hi

Orion Platform 2014.2.1, SAM 6.1.1, QoE 1.0, NPM 11.0.1, NTA 3.11.0, IVIM 1.10.0

I've noticed some odd behaviour when creating advanced alerts on Orion. Leaving the to: blank and only sending to bcc: (or cc: either) creates an "Email attempt failed for alert..." /  "Could not prepare the action for action type Email to test alert.." error to be reported; the alert does not trigger for genuine events either.

Is this a known issue?

There are certain situations where it's desirable to hide email recipients by using bcc; how do people out there normally deal with this scenario?

Thanks

Paul