Asus RT-AC5300 5ghz-2 Constantly Disappearing

I've had this Asus 5300 for less than 2 weeks now and it seems as each day passes, my 5ghz-2 band goes offline and disappears altogether. The only way to get it back is if I make any sort of change to that band and then save. And only then will it come back but will eventually randomly disappear again, and again I have to make a change to a setting and repeat. It seems to be happening more often now, the last couple of days it happens up to 3 times a day.

Is this a defective unit? Or is...

Asus RT-AC5300 5ghz-2 Constantly Disappearing