I saw this by comparing with the mac address indicated on the sticker of the device
This is not the first time that I realize that the manufacturers are doing anything
For example, I bought two NeWfi D2 boxes where the MAC addresses were identical on the two devices and which did not correspond to the sticker either. In this case it was easy because the breed bootloader can reprogram the 4 * MAC addresses of the product /art partition and it is supported correctly by the OpenWrt firmware
I also encountered the same problems with CUDY-X6 and Huasifei WR1800K-AX-Nand boxes exactly as with my 2 * Tenbay
With the mods ( dts file & 10_fix_wifi_mac ) i now have everything correct: and all is good
no problems with the Wifi 2.4 & 5 Ghz
LAN = Sticker
WAN = Sticker +1
WIFI 2.4 GHz = Sticker +2
WIFI 5 GHz = Sticker +3
Also i use the 2 Tenbay box with 32M flash ...