Well the router (RT-AC87U) supports WOL it even has it in UI, but it is possible something is interfering with it. I also tried to trigger WOL from another computer on the network but it didn't work either. I try to use wireshark to check if the packets are getting through at all.
Besides turning it on in UEFI did you have to do anything else to enable WOL?
P.S. I tested it on 4204 before upgrading and the result was the same, so something is apparently interfering.
R7 1700x @3,95
Geil EVO x 16gb ddr4 3200
Asus Prime x370 pro
500GB Samsung 970 pro
EKWB watercooling (cpu+gpu)