BIGIP Doesnt show mirror ip in show cm device.

I have 2 lab devices in an ha pair, everything is fine but connection mirror wont come up.

Looks like bug behavior as of now:

From Active: root@(bigip1)(cfg-sync In Sync)(Active)(/Common)(tmos) show cm device

---------------------------------------------------------
CentMgmt::Device: bigip1.akmlab.local
---------------------------------------------------------
Hostname                        bigip1.akmlab.local
Mgmt Ip                         10.1.60.41
Configsync Ip                   10.1.63.41
Mirroring IP                    10.1.63.41
Mirroring Secondary IP          10.1.61.41
Failover Multicast IP           224.0.0.245
Failover Unicast IP(s)          10.1.63.41, management-ip
Device HA State                 active
Device HA Load Capacity         0
Device Current Load Factor      1
Device Next Active Load Factor  0

---------------------------------------------------------
CentMgmt::Device: bigip2.akmlab.local
---------------------------------------------------------
Hostname                        bigip2.akmlab.local
Mgmt Ip                         10.1.60.42
Configsync Ip                   10.1.63.42
Mirroring IP                    :: this part doesnt show the ip
Mirroring Secondary IP          ::
Failover Multicast IP           224.0.0.245
Failover Unicast IP(s)          10.1.63.42, management-ip
Device HA State                 standby
Device HA Load Capacity         0
Device Current Load Factor      0
Device Next Active Load Factor  1

From Passive:

root@(bigip2)(cfg-sync In Sync)(Standby)(/Common)(tmos) show  cm device

---------------------------------------------------------
CentMgmt::Device: bigip1.akmlab.local
---------------------------------------------------------
Hostname                        bigip1.akmlab.local
Mgmt Ip                         10.1.60.41
Configsync Ip                   10.1.63.41
Mirroring IP                    10.1.63.41
Mirroring Secondary IP          10.1.61.41
Failover Multicast IP           224.0.0.245
Failover Unicast IP(s)          10.1.63.41, management-ip
Device HA State                 active
Device HA Load Capacity         0
Device Current Load Factor      1
Device Next Active Load Factor  0

---------------------------------------------------------
CentMgmt::Device: bigip2.akmlab.local
---------------------------------------------------------
Hostname                        bigip2.akmlab.local
Mgmt Ip                         10.1.60.42
Configsync Ip                   10.1.63.42
Mirroring IP                    ::
Mirroring Secondary IP          ::
Failover Multicast IP           224.0.0.245
Failover Unicast IP(s)          10.1.63.42, management-ip
Device HA State                 standby
Device HA Load Capacity         0
Device Current Load Factor      0
Device Next Active Load Factor  1

Verions: root@(bigip1)(cfg-sync Changes Pending)(Active)(/Common)(tmos) show sys version

Sys::Version
Main Package
  Product     BIG-IP
  Version     12.1.3
  Build       0.0.378
  Edition     Final
  Date        Mon Nov 27 16:41:03 PST 2017