(Sonos, Echo) Say command is not performed on Sonos boxes after starting a radio station via an EchoDot

I’m moved to the OH2.4 stable and added the (XMas present) EchoDot.

The before working rule to send a TTS message to the sonos boxes stopped working?

It continued to work on boxes that haven’t been started by the Echo to play a TuneIn radio station. After such a “smart move” the boxes doesn’t play the TTS mp3 anymore!
After restarting the radiostation again via the Sonos App the Say Command is working again!

Is this a known bug?

Filed an Issue