Direct Connection not working on LAN
I have Plex Media Server running on a Window 10 box. For some reason when I try to connect from my iPhone, while connected to the same network that the Server is connected to, I get an error saying "Direction Connection Unavailable." Strangely, It will connect via indirectly via relay, and remotely when on an external network. Just can't get the Direct connect working. Any ideas?
Here are some details in case they help:
Windows Version: 10 Home 64bit
Plex Server Version: 18.104.22.16887-1bef33a
Plex Player version: iOS V4.5
Router: Pace PLC 5286ac