From all the reading through multiple threads, on different products, it seems like lots of people are having problems with running these routers in "bridge-mode". Similar problems are also seen in AP mode, but am not sure if the two problems may be related.
I seen mention of RT-AC66U, (RT-AC67U?), RT-AC68U, RT-AC87U, and now RT-AC88U
It seems like this problem has been going on since at least 2013 (according to some threads)
I've owned the AC67 (maybe not), AC68, and AC87
It's like it...
Asus Products Bridge-Mode Problem (maybe all models)
I seen mention of RT-AC66U, (RT-AC67U?), RT-AC68U, RT-AC87U, and now RT-AC88U
It seems like this problem has been going on since at least 2013 (according to some threads)
I've owned the AC67 (maybe not), AC68, and AC87
It's like it...
Asus Products Bridge-Mode Problem (maybe all models)