All but one is working properly as it does not active the WAN port either by using DHCP (Wired) or providing Static IP (Wired). The "Renew Lease Now" is greyed out when using DCHP and no green light is active on the WAN port on the front of the router.
I backed to original TP-link software using the provided firmware on Gargoyle (wr1043nv1_en_3_9_17-sysupgrade.bin) and then upgraded to the lastest firmware from TP-link (wr1043nv1_en_3_13_12_up_boot(120405).bin).
Using the TP-link firmware the DCHP on WAN works immediately.
Now upgrading the router back to Gargoyle using the sem firmware gargoyle_1.4.7-ar71xx-tl-wr1043nd-v1-squashfs-factory.bin and even using "Restore Default configuration Now" the router is back to the state where WAN port is no longer functional

Any ideas what is causing this behavior and ideally how to resolve this?
Thanks!