When connecting a PC and a Mac the game runs just fine, but when trying to connect my PC with my Windows Phone I can see both player's Player game object being instantiated so I know that's fine, but the command to start the game doesn't get sent to the Windows Phone (or vice versa if the WP is hosting).
I've run the game in the editor to see what messages get logged and there's one in particular which I don't think happened when playing between PC and Mac:
Multiplayer RPCs and CMDs work between PC and Mac but not on mobile
I've run the game in the editor to see what messages get logged and there's one in particular which I don't think happened when playing between PC and Mac: