This has been happening since we bought the chromecast about a month
ago.It happens casting from an android phone or an ipad.Sorry the
chromecast is behind the TV I haven't seen the LED.The cast firmware is
1.52.253741.Google Home version is 2.45.1.8...
I'm still having the issues. I haven't troubleshot anything yet. If I
disconnect from the Chromecast and then reconnect it will start
streaming. It is an annoying work around.