I have the same problem, and that's because my Spectrum server is a virtual machine, managed by the vCenter discovered with the VCAIM and modeled in Spectrum under the Virtual Host Manager module. That's a known issue, and the official answer from CA Support was this:
Case Comment added for case:00429859
Thanks for the update Elio.
I was told by the specialists this is known to cause unexpected behavior.
The recommended would be not to manage the vcenter where the SS reside to void issues.
At least not with the SystemEDGE VCAIM.
Of course, almost nobody has a physical Spectrum server or not managed by the vCenter one would discover with Spectrum.