timestamp fib not updating

Hi,

On a stack of two S5720-32C-HI-24S-AC's running V200R013C00SPC300 I see the timestamps on the masterswitch not increasing when using the "display fib 0" command. When I issue the same command adding the verbose option I do see an increasing age counter. The timestamp counter is also increasing on the standby switch:

active:

dis fib 0
Route Flags: G - Gateway Route, H - Host Route,    U - Up Route
             S - Static Route,  D - Dynamic Route, B - Black Hole Route
             L - Vlink Route
--------------------------------------------------------------------------------
 FIB Table:
 Total number of Routes : 5

Destination/Mask   Nexthop         Flag  TimeStamp     Interface      TunnelID
127.0.0.1/32       127.0.0.1       HU    t[791]        InLoop0        0x0
10.80.1.3/32       127.0.0.1       HU    t[791]        InLoop0        0x0
10.80.0.0/16       10.80.1.3       U     t[791]        Vlanif80       0x0
127.0.0.0/8        127.0.0.1       U     t[791]        InLoop0        0x0
0.0.0.0/0          10.80.0.1       GSU   t[791]        Vlanif80       0x0

Standby:

dis fib 1
 FIB Table:
 Total number of Routes : 5

Destination/Mask   Nexthop         Flag  TimeStamp     Interface      TunnelID
127.0.0.1/32       127.0.0.1       HU    t[18569129]   InLoop0        0x0
10.80.1.3/32       127.0.0.1       HU    t[18569129]   InLoop0        0x0
10.80.0.0/16       10.80.1.3       U     t[18569129]   Vlanif80       0x0
127.0.0.0/8        127.0.0.1       U     t[18569129]   InLoop0        0x0
0.0.0.0/0          10.80.0.1       GSU   t[18569129]   Vlanif80       0x0

Verbose of active:

dis fib 0 verbose
Route Flags: G - Gateway Route, H - Host Route,    U - Up Route
             S - Static Route,  D - Dynamic Route, B - Black Hole Route
             L - Vlink Route
------------------------------------------------------------------------------
 FIB Table:
 Total number of Routes : 5

 Destination: 127.0.0.1           Mask     : 255.255.255.255
 Nexthop    : 127.0.0.1           OutIf    : InLoopBack0
 LocalAddr  : 127.0.0.1           LocalMask: 0.0.0.0
 Flags      : HU                  Age      : 18568746sec
 ATIndex    : 0                   Slot     : 0
 LspFwdFlag : 0                   LspToken : 0x0
 InLabel    : NULL                OriginAs : 0
 BGPNextHop : 0.0.0.0             PeerAs   : 0
 QosInfo    : 0x0                 OriginQos: 0x0
 NexthopBak : 0.0.0.0             OutIfBak : [No Intf]
 LspTokenBak: 0x0                 InLabelBak : NULL
 LspToken_ForInLabelBak : 0x0
 EntryRefCount : 0
 VlanId : 0x0
 BgpKey : 0
 BgpKeyBak : 0
 LspType         : 0              Label_ForLspTokenBak   : 0

Is this a known bug that I'm running into?

Thanks in advance!