I tried to do PS4 Remote Play using my Playstation TV. My PS4 and PS TV were both connected through the same router by LAN.
As soon as I clicked “next” in the Remote Play screen on my PS TV, the connection icon automatically changed to a weak wifi ?? and error came up saying the connection was not strong enough.
I tried using my Wifi after that and I got full bar. And my LAN speed was not so bad 35+ Mbps