At the end there was nothing more then I posted. Here my next try with activated error logging:
20:49:03debug [pimatic-sounds]: Error in playAnnouncement: undefined
20:49:03debug [pimatic-sounds]: Error startReplaying Error: Load failed
20:49:03debug [pimatic-sounds]: Error load replay Error: Load failed
20:49:02debug [pimatic-sounds]: Setvolume data: {
"level": 0.1818181872367859
}
20:49:02debug [pimatic-sounds]: Setting volume to 0.1818181872367859
20:48:59debug [pimatic-sounds]: Casting stopped
20:48:57debug [pimatic-sounds]: Playing announcement on device 'google-home-wohnzimmer' with volume 20
20:48:55debug [pimatic-sounds]: Setvolume data: {
"level": 0.2
}
20:48:55debug [pimatic-sounds]: Setting volume to 0.2
20:48:55error [pimatic]: rule tts-googlehome-wohnzimmer error executing an action: Cannot read property 'length' of undefined
20:48:55debug [pimatic-sounds]: Sound generated, now casting http://192.168.0.100:8089/google-home-wohnzimmer_text.mp3
20:48:55debug [pimatic-sounds]: Error: null
20:48:55debug [pimatic-sounds]: Creating sound file... with text: bla
No more things happens during before, while and after the announcement.