Nope, that's not the case, at least not with my case. I do have alias port assigned to specific port. Taking an example for my Samba share, I have a virtual server listening to all the ports and so do the pool. But the smb monitor I have is associated with alias service port 445. But right after upgrading to version 12.0.0.0, I got the samba monitor down and service was down as well.
And yes, i do understand that I can still use the ICMP monitor but it is not reliable.
Thanks for answering and please let me know if something else I can try.