Server in status "Shutoff" and power status "Shutdown" after blade reboot

A VM is created on node-7 with nova boot command.
root@node-2:/var/log# nova list
+--------------------------------------+---------+--------+------------+-------------+-------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+---------+--------+------------+-------------+-------------------+
| cc70be0e-fc5e-4f4f-b260-01a055dff09c | MOS51 | ACTIVE | - | Running | private=10.0.10.2 |

VM is in correct state.

Login to node-7 and execute a "reboot" of the blade.
The blade recovers and new VMs can be created, but the existing VM at the time of reboot goes into status Shutoff and power state Shutdown.
The VM does not recover on its own.
root@node-2:/var/log# nova list
+--------------------------------------+---------+---------+------------+-------------+-------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+---------+---------+------------+-------------+-------------------+
| cc70be0e-fc5e-4f4f-b260-01a055dff09c | MOS51 | SHUTOFF | - | Shutdown | private=10.0.10.2 |

Workaround:
Execute a hard reboot of the VM and it recovers to the correct status and power state.
nova reboot --hard cc70be0e-fc5e-4f4f-b260-01a055dff09c

Configuration data :
HP C7000 node with MOS5.1 installed.

[root@fuel ~]# fuel node list
id | status | name | cluster | ip | mac | roles | pending_roles | online
---|--------|------------------|---------|---------------|-------------------|---------------------------|---------------|-------
6 | ready | Untitled (00:18) | 1 | 192.168.3.105 | 72:f0:a1:89:ae:4b | compute | | True
1 | ready | Untitled (00:04) | 1 | 192.168.3.100 | 4e:90:fb:ee:ef:4d | cinder, controller, mongo | | True
5 | ready | Untitled (00:14) | 1 | 192.168.3.104 | b2:1a:8f:ad:d6:4f | compute | | True
2 | ready | Untitled (00:08) | 1 | 192.168.3.101 | 72:f5:c6:c7:12:48 | cinder, controller, mongo | | True
4 | ready | Untitled (00:10) | 1 | 192.168.3.103 | 2a:1b:0b:7c:6f:45 | compute | | True
3 | ready | Untitled (00:0c) | 1 | 192.168.3.102 | 22:63:ec:e1:b0:40 | cinder, controller, mongo | | True
7 | ready | Untitled (00:1c) | 1 | 192.168.3.106 | ae:59:66:7b:31:48 | compute | | True
[root@fuel ~]#