2865 WiFi Router - Vendor ID N/A

It's quite surprising that the screen that reports connected WiFI devices "Station List of All Devices" has Vendor ID of 'N/A' for 12 of the 20 connected WiFi devices.

Presumably the router has somewhere a file of Vendor and part MAC addresses.  This would seem to be out of date despite the router having the latest firmware.

It's a shame that there's no option to update this.