cant see interface from GUI

Hi,

I have fortigate 3600c*2 in HA mode, version "FG3K6C-5.00-build305" with 4 vdoms.

Recently i cant see interface (system->interface) from vdom root or global (i can see interface from all others vdoms), i had this problem before and i just reboot the machine, but this time i rebooted the machine and still i cant see the interfaces.

From cli everything work fine.

It looks like BUG.

Any help ?

Regards

Rafi