Traffic Graph : IN speed not showing

[interkrome]

Hi everyone,

Need some help over here. Having issue with the graph. It didn't show the "IN" value.  Details is my machine :

    re1@pci0:4:1:0: class=0x020000 card=0x43001186 chip=0x43001186 rev=0x10 hdr=0x00
    vendor     = 'D-Link System Inc'
    device     = 'DGE-528T Gigabit Ethernet Adapter'
    class      = network
    subclass   = ethernet

   OPNsense 16.7.14_2-i386
   FreeBSD 10.3-RELEASE-p14
   OpenSSL 1.0.2j 26 Sep 2016

Afraid of GUI issue, i tested to open the portal via Chrome, IE & Firefox but not to avail. Could it be kernel issue? Btw, the ip is on DHCP.