Not getting STREAM_READY event, can't reconnect to session

I don't always get the STREAM_READY event which is a problem.

To handle this, I tried restarting the avatar session. But calling stopAvatar returns {"code":400112,"message":"Unauthorized"}.

createStartAvatar also returns Unauthorized. I tried newSession and startSession and they also didn't work.

How should we handle Not getting STREAM_READY event? This shouldn't even be happening.