AC66U Client Map Question - LAN shows up as Wireless client

I have two AC66U's. I use one as a LAN router & the other as a Wireless Router. I am getting periodic connection issues with my wireless clients. I can't track the issue down but I noticed that the LAN one was listed as a client of the Wireless one. Is this normal or OK? The Wireless is listed as a client on the LAN one, which I expect.

The LAN one is connected to the modem and wireless is disabled. The LAN ports support wired connections throughout the house (roku, tivo, xbox,...

AC66U Client Map Question - LAN shows up as Wireless client