I've recently got this router in the Black Friday deals but something seems to have gone wrong on Sunday evening with one of the Wifi channels, It is running Merlin 380.68_4 and have seen 5G-2 working previously as recall seeing a MAC Address against each band with difference of 2 digit increment between them. I also noticed another issue on Sunday evening and now wondering if they are related:...
RT-AC5300 Wifi 5g-2 missing band and MAC address
RT-AC5300 Wifi 5g-2 missing band and MAC address