As stated in our release notes, this is a known issue with the Android SDK. If a Peer joins a room with NO_AUDIO_NO_VIDEO for both send and receive configs, the Peer will not be able to connect to other Peers.

This issue only exists when Skylink Media Relay (MCU) is enabled.

If Skylink Media Relay (MCU) is required for your use case, a possible workaround is for the user to join the room with VIDEO_ONLY for setAudioVideoReceiveConfig, but mute and not display these streams when they are received.