For MCU connections only, AudioStreams and VideoStreams which start in Receive Only mode, will not send audio/video when renegotiated to Send/Receive mode.

For example ...

audioStream.LocalDirection = FM.LiveSwitch.StreamDirection.ReceiveOnly;

...

var config = _McuConnection.Config;
config.AudioDirection = "sendrecv";
_McuConnection.Update(config);

... will not result in audio being sent and received on the stream.

There is a work around, which is to use the stream's setMuted method instead of setLocalDirection. The team is aware of this issue and we will be releasing a patch imminently.

Please note that this does not affect SFU or P2P connections.

Update - July 22, 2020

The LiveSwitch 1.9.1 release is out and provides a fix for this issue. Release notes are available here, and you can download the latest here.

The relevant release note is:

> Fixed a bug where MCU media might not activate after initializing a receive-only MCU connection and changing the direction to send-receive (LS-5172);