UNET: Client Disconnect Error: Timeout in local lobby

I have a simple game that uses custom NetworkLobbyManager. When I connect 3 android phones in local network, one client always gets disconnected after some time. It's usually between 30 seconds and 1.5 minute (rarely a few minutes) after the online scene is started.

What could possibly cause this?

I've seen people having similar issue with matchmaker because of the bandwidth limit, but I guess this cannot be the case in local multiplayer. I don't have any commands/rpc calls inside the...

UNET: Client Disconnect Error: Timeout in local lobby