Hi. I'm creating a maily mobile game that uses matchmaker. I've been testing in editor and on standalone builds and everything works ok. But when I run it on mobile (Android) build matchmaker doesn't invoke callbacks. One of tests tha I've made: 1. Run game on mobile and in Editor NetworkLobbyManager(Instance).StartMatchMaker() on both 2. In mobile build invoke NetworkLobbyManager(Instance).matchMaker.CreateMatch(... , OnMatchCreatedCallback) Here I've got log: MatchMakingClient Create :https://mm.unet.unity3d.com/json/reply/CreateMatchRequest and event if I wait couple of minuted the OnMatchCreatedCallback isn't called. 3. In Editor invoke NetworkLobbyManager(Instance).matchMaker.ListMatches(... , OnMatchListReceivedCallback) Almost instantly the OnMatchListReceivedCallback is called, game hosted on mobile is listed and I can join it with no problem. If I try the other way: host game in Editor and try to connect from mobile, then again. Everything works great in Editor and on mobile I don't receive any callbacks on mobile. I've tested it on two different Android devices. I would be glad for any hints. I'm using Unity Personal. I've set up Unity Multiplayer for this project. Is there any extra configuration step for debug mobile builds? Is there a workaround/other way to check if there is response from relay server? Or maybe it's a known bug? Thanks in advance.