"Hosts reboots", BUT VMM don't get it.

Running VMM 2012 r2 with UR5.

No cluster env. When I try to reboot a host I get this error:
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Warning (20501)
Virtual Machine Manager failed to shutdown the computer hyperv1.azure.local.

Recommended Action
Shutdown the computer hyperv1.azure.local manually.

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The machine is rebooting! But VMM dont get it, its still saying "Rebooting host" in jobs.

Any idea?