Did you see the no WiFi icon before getting defeated? The no Wi-Fi icon indicates you're not currently connected to the server. In some cases, your device may be connected to the local network and/or to the Internet as well, but you will get the no Wi-Fi icon if you're not connected to the server. Causes of this include network issues or perhaps a bug.

I looked at Qenn's account and didn't see any signs of cheating so I think you just had network issues at the end of that match.